Ships

The origins

The end of the Great War saw the Regal Marina come out of it with a new weapon: the MAS (Motoscafo Anti Sommergibile – Anti Submarine Motorboat). This weapon had given to the Italian Navy the most glamorous successes, such as the sinking of the battleships SZENT ISTVAN and WIEN, respectively, by MAS 15 and 9. By the end of the conflict, 422 MAS had been ordered; of these 244 were already in service, others would be completed in the postwar period, and many were canceled or sold to private individuals or completed as civil boats.

Between the two wars

The end of the war, however, didn’t interrupt the development of this weapon, which had revealed itself so effectively. Various prototypes were experimented with employing engines of various types, and finally, the much sought after high speed of attack was attained (the MAS during the Great War stayed, in general, well below the 30 knots of maximum speed).

The general design, however, remained the same as the MAS of the First World War. In 1931/32 the shipyard Baglietto, exploiting the experience acquired during the production, in 1926, of a unity for the French Navy in collaboration with the shipyards “Loire “, realized a prototype, the MAS-431, that summarized the best of the experiences gathered up to that moment.

Propelled by two gas engines FIAT of 1500 HP and equipped with a step hull (rédan), this vessel during tests reached about 45 knots of maximum speed in calm waters, with an excellent maneuverability, good seafaring and sturdiness. Another prototype built in the second half the 30s, but which didn’t give satisfactory results, was the STEFANO TURR. It was a large boat of over 60 tons of displacement that, besides dimensions notably superior to those of the MAS of the period, had the peculiarity of having four fast diesel engines, rather than gasoline ones. This experiment was an attempt to resolve the problem of gasoline flammability in the case, for instance, of hits aboard the vessel.

Unfortunately, the installed FIAT engines never gave satisfactory results in terms of reliability, so much that the unit, which had foreseen, of quite a few years, many characteristics of the best MS built during the war by the Germans, was removed from service and demolished in 1941. Failing this experiment, and with the international situation starting to deteriorate, the Regia Marina chose to lean toward the MAS derived from the prototype Baglietto. From 1936 to 1941, four series of MAS were built starting from the 431. The first series comprised 26 units, the second 25, the third 14, and the fourth 11. The base characteristics of these 76 MAS didn’t vary much between the several series. Displacement was of 23 to 30 tons, the engine was the excellent Isotta Fraschini Ace 1000 in various versions with a power output of 2000/2300 HP, and a maximum speed around 40-42 knots at full load. These MAS were equipped with two 450-mm torpedo launchers. The anti-aircraft armament had one or two guns with caliber ranging from 13,2 to 20 millimeters.

The war

The war employment of the MAS showed, nevertheless, some defects mainly caused by the search, at all the costs, for very elevated maximum speeds. The price paid was in terms of unsatisfactory seaworthiness, especially in the case of less than ideal sea conditions. This was caused by the excessive lightness of the construction, and from the type of step hull adopted, which was designed to attain very elevated speed, but at the expense of seaworthiness. As a matter of fact, the MAS were notably difficult to operate in the case of rough seas, with serious risks to the safety of the crews.

In April 1941, while possible solutions to the problem were studied, the capture of what remained of the Yugoslav fleet provided the solution on a silver plate. Besides the other material, six torpedo boats of German construction were captured in the port of Cattaro. They were all of the type Ss 1, built by the shipyard Lurssen. These units, of about 65 tons, immediately proofed themselves in conformity with the requirements of the Regia Marina. In fact, the shape of their hulls allowed them to properly maintain high speeds even under not-too-ideal sea conditions. The shipyard CRDA of Monfalcone was therefore given the task to redraw the blueprints of these units and from these derive a new Italian project for a MS.

Thus was born the MS “CRDA 60 t.” which replicated, with minimal changes, the original German model. The model was immediately reproduced in a first series of 18 units, which entered service beginning in April 1942. This first series was followed by a second one of as many, of which the last unit was not delivered because of the armistice of 8th September. The MS of this type, even though inspired by an outmoded German model, was better fit for the long patrols in the Mediterranean than the MAS. Although not as fast, they surely had better seaworthiness and, due to the greater dimensions, they were more comfortable, better armed, and with greater range.

On the same hull of the ex-German MS, a small unit for anti-submarine patrol and coastal escort called “Vedetta Anti Sommergibile” or VAS was designed. Not as fast as the M.S, it had a powerful (for its dimensions) antisubmarine arsenal. The VAS was built in 45 units (of the 48 ordered) starting in 1942. Later, a new model was studied with a displacement around 90 tons, instead of the 68-70 of the first series. Six of the twelve units originally ordered were built.

These were the last units placed into service by the Regia Marina during World War II. The building programs of 1943 and 1944 foresaw the construction of quite a lot more units: 44 MS of the type “CRDA 60 ts.” in two following series, 30 MAS, 9 units derived from the German MS of the type S-26.

Some of these units had to be completed as gunboats, replacing the torpedoes with 37/54 guns and quadruple 20mm guns, to oppose, as much as they could, the fast Anglo-Americans units which usually mounted a superior armament. Besides these units, another two series of VAS were programmed: 12 ordered from Italian yards, and as many to be built by shipyards of occupied France. All these units belonged to the 90-ton type.

The successes

The MAS and the MS achieved notable successes during the war. It must be noted that, besides the sinking of numerous merchant ships, these units sunk the largest warship sunk by a torpedo boat in the period 1939/45. This was the English light cruiser MANCHESTER , sunk during the Battle of Mid-August by MS 16 and 22.

It also must be noted the sinking of the English destroyer LIGHTNING (Algerian coasts, March 12th 1943), the Russian submarine EQUOKA (Black Sea, June 19th 1942), and the serious damages to the English cruisers CAPETOWN (MAS 213 April 8th 1941) and Russian MOLOTOV. (MAS 568 and 573 August 3rd 1942).

The task of escorting convoys, which during World War Two became increasingly challenging and exhausting, was set by assigning to the undertaking both fleet destroyers, the number of which was barely sufficient to escort battleships, and torpedo boats of the “Spica” class of which, between 1935 and 1938, 32 had entered service. These last units were the ones that had to sustain the onerous task of escorting convoys for the duration of the conflict. The torpedo boats of the “Spica” class, known as fast torpedo boats, thus with characteristics specific to attack units, were not particularly adapted to the task assigned to them due to their range, seaworthiness, maneuverability and antisubmarine armament. Nevertheless, they performed their duty but at a human cost of enormous dedication, performing beyond any prize. Of the 30 units in service at the beginning of the war, 23 were lost due to war events.

Therefore, it became necessary to firmly face the problem of the fast construction of units tailored to convoy escorts adequately equipped for antisubmarine warfare. At the Ministry of the Navy, some projects already existed for the construction of ships of modest displacement, particularly adapted to convoy escort, and antisubmarine activity. It was only after the institution of the antisubmarine Department in summer 1941 that such projects were reexamined with the goal of coming up with a definitive one.
From an initial project which called for coastal units of about 400 tons, and another which increased it up to 580 tons, was born yet another one which brought displacement up to 613 tons. None of these solutions was completely satisfying.

The best qualities were in the end found in a project by Admiral (E) Fea for a vessel of about 660 to 670 tons, which included the best in terms of weaponry and equipment the Italian industry could offer at the time Thus were born these “pure” escort units and their construction could be considered, without any doubts, the best success in the area of naval constructions reached by the Italian Navy in World War Two. Without any relation to their forerunners of the second half of the 18th century (sail corvettes, steam corvettes with both paddlewheels and propellers), these units were called “antisubmarine corvettes”.
Their performances proved excellent: high range, readiness (they could become operational in 10 minutes), and relative simplicity so that their construction could be assigned to several shipyards. As a result, the construction of the ships of the “Gabbiano” class in six shipyards started at such a rhythm that some of them were ready to enter service after only eight and one half months from being laid down.
The hull was made of high strength steel and the upper structure in light aluminum alloys. The engines were diesel using light diesel fuel and not fuel oil like steam engines. Thus, there was no need for water for the engines, and they could be started right away. Range was high, and the number of engine personnel limited.

All the units were equipped with sonar, the most modern equipment used to detect submerged submarines. In addition to the standard fore-bridge which was quite large, there was just above an upper fore-bridge which had a secondary rudder and engine telegraph. Since this fore-bridge was also equipped with a magnetic compass, it could be used for regular navigation, making escorting and A/S much easier. From this fore-bridge there was a complete view of the horizon and the whole ship. The only negative aspect was the fact that deck personnel was constantly exposed to the weather, even though there were some deflectors which would break the air flow caused by the movement of the ship, thus reducing the impact of air and water when the ship was into wind.

On these corvettes the adoption of electric power was absolutely new. This was just like the one on submarines, utilizing batteries. The intent was two fold: reduce the noise of the ship while chasing a submarine, and also reduce interference with the sonar thus improving its ability to discover and attack. The antiaircraft and anti-ship armament included a 100/47 gun placed forward, three 20/70 machine guns in single installations also forward, four 20/65 machine guns in dual mounting installed on the deck-house in the middle of the ship, and two 450 mm torpedo tubes, one on each side of the ship.

The antisubmarine armament was quite considerable; it included 8 single throwers (mud hoppers), four on each side, and two Gatteschi dischargers installed aft. Each thrower could launch a 150 kg bomb 100 to 140 meters away. Each thrower could launch in rapid succession up to three bombs before it had to be reloaded. The two Matteschi dischargers installed one next to the other aft were equipped with six 2-charge trolleys, which upon command could be dropped into the water. This armament allowed for the contemporaneous dropping of 12 bombs for a total of 1,800 kg of explosive which made a “pocket” around the submarine under attack. Some of the corvettes were also equipped with 2 antisubmarine towing torpedoed type “Ginocchio”.

These corvettes were not equipped with radar and did not have any special equipment to compute “firing and shooting”. Even though the deck-house was equipped with a small elevated area to rest a telemeter, the deck gun was directed using the “non instrumental” shooting and the order were given via a voice-pipe or by telephone. The machine guns were operated with simple eye sights. Same for the torpedoes; there was no firing control mechanism. The commanding officer estimated Cinematic data and the calculation of the shooting angle was computed with a protractor or using a simple predictor made by De Pace. Antisubmarine attacks were conducted following the standard “dog tail”. Thus, simplicity was the fundamental characteristic of these ships.

Maximum speed was slightly higher than 18 knots, but only during trials, while the regular speed was only 10 to 12 knots, sufficient for convoy escort, and at this speed range was over 3,400 miles. Crew included 5 officers (2 from the reserve), 12 non-commissioned officers, and 93 sailors. In conclusion, these ships were beautiful ships from an architectonical viewpoint, but also well conceived from all other viewpoints. One should consider that although they were built for a war service estimated at only six months, they had a very long service history and were of great use in multiple use for over 25 years.

Their construction began at the end of 1941; sixty were ordered, and at times shipyards had up to six on the slip at the same time. Their history was ranging. Only 28 units entered service before the armistice and they were used operationally only for a small period of time, but they served with honor. Some units were lost during the war, others were lost during the armistice, and others were captured by the Germans when still under completion or on the slips. Some were not even finished. 19 units survived the armistice and almost immediately began their operational activity alongside the Allies. In total, in the short period before the armistice the corvettes completed 278 antisubmarine missions, 174 escort missions, 6 transport, and 137 of another nature.

Between September 8th and May 8th 1945, the surviving 19 units completed 11 war patrols, 31 antisubmarine missions, 133 antisubmarine patrols, 32 transports, 1,508 escorts, 45 miscellaneous and 340 training missions. At the end of the hostilities the corvettes were transformed into minesweepers completing several minesweeping campaigns. In the subsequent years, three more “rescued” units entered service, thus bringing the total number in the post-war period to 22. Since over time the various codes painted on the bow varied based on national (1950-52) or NATO schema, we are providing the following chart:

Over time these corvettes received various alterations to the power plant. The electric motors and the very heavy batteries were removed, and so was the main 100/47 gun. The machine guns were replaced with others of greater caliber. The lateral throwers were replaced with more modern ones and an American-made “porcupine” (Pneumatic thrower) was installed forward since the A/S attack criteria had in the meantime changed. The “Gatteschi” railings were removed, reinstalled, and removed again based on need. The same applied to the torpedo launchers. Superstructure was also radically modified. All units eventually received radar and the fore-bridge was altered. In short, these corvettes were continuously modified to adapt them, from time to time, to specific tasks. The activity which involved all the units with great intensity, even though with the necessary rotations, was the one of “command school” demonstrating themselves really fit for the training of young captains.

After over 25 years since the first unit had entered service, 14 units were still in service. The corvettes were no longer used as part of the naval squadron, but they were useful nevertheless: training cruises, departmental services, rescue of merchant ships, hydrographic campaigns, fishing surveillance, etc. After so much activity, they were eventually stricken from the active role of the Navy, but left behind nostalgia in the officers who acquired their first command experience, and in generations of non-commissioned officers and sailors who got their feet wet aboard them.

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Bibliography:
– Esploratori Fregate Corvette ed Avvisi italiano Autore Bargoni Ed. U.S.M.M. 1974.
– Almanacco storico delle Navi Militari Italiane 1861 – 1995 Autori Giorgerini – Nani Ed. U.S.M.M. 1996.
The author, a former Navy officer, spend over four years aboard these vessels with different ranks and assignments.

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Translated from Italian by Cristiano D’Adamo and edited by Laura K. Yost

Between 1925 and 1945, the Regia Marina built only one kind of explorer, the “Navigatori” class. These units were classified explorers in 1929 and reclassified destroyers in 1938. During the period leading to World War II, the Regia Marina built or refurbished 8 battleships, numerous light and heavy cruisers, but the units which were built in the largest number were destroyers and explorers.

The destroyers were, by then, units belonging to naval squadrons and not any longer than the original torpedo boat hunters. This new class of ships was required to be able to attack using torpedoes and cannon fire and was also expected to provide escort for larger units. These new units not only grew in scope, but also in displacement which from the original 1,560 tons of the “Turbine” class, grew to the 2,460 tons of the “Soldato” class. The armament usually consisted of several 120mm guns and 4 to 6 533mm torpedo launchers.
One of the original requirements was speed. These new units were capable of speed of 38 to 39 knots while being sufficiently seaworthy. Unfortunately, on March 23rd 1942, during the Second battle of the Sirte, the “Scirocco” of the “Maestrale” class and the “Lanciere” of the “Soldati” class were lost to an unusually violent gale.

The general silhouette, armament, and the location of the smokestacks did not vary much between older and newer models. All the italian destroyers, from the “Sauro” class onwards, had a main armament of two twin 120 mm. guns, one on the forecastle and one at the stern (often on a bandstand). The only exceptions to this general rule were: the “Sella” class (initially they had only a single gun on the forecastle, replaced in 1929/1930 by a twin turret), the “Navigatori” class (armed with six 120mm. guns in three twin turrets, the third being between the torpedo tubes, amidships), the second group of the “Soldati” class (with the exception of the Velite) had a fifth gun in a single turret amidships) and the planned “Comandanti” class that was to be armed with four single 135 mm guns. We do not consider in this analysis the ex enemy destroyers of the Premuda, Sebenico and FR classes.
Torpedo launchers were twin mountings in the “Sella” class and (for some periods only) in the “Navigatori” class, and triple mountings from the “Sauro” class onwards. These launchers were fully adjustable and always mounted on the centerline.

All units had two propellers, with two separate engine rooms and two or three boilers. Up to the “Turbine” class, all units had two smokestacks, which were later reduced to one starting with the “Freccia” class (1931).
The war decimated the Regia Marina, especially in the area of explorers and destroyers: 11 out of 12 explorers and 30 out of 41 destroyers were lost. Of the remaining 12 units, two were captured by the Germans, while others were transferred to the victorious Allies. At the end of the hostilities, Italy was left with only four units.

Adapted and translated from the book “Guida alle navi d’Italia”, by Gino Galuppini, published in 1982 by Arnold Mondadori Editore.

Edited by Cristiano d’Adamo and Pierluigi Malvezzi

Each article covers a specific type and or class.

• Italian Vessels
  • Italian Aircraft Carriers
  • Italian Battleships
  • Italian Cruisers
  • Italian Obsolete Cruisers
  • Torpedo Boats
  • Corvettes
  • MAS, VAS and MS
  • Minesweepers
  • Foreign-built
  • Submarines
    
• Specifications for all classes
  
• All vessels utilized by the Regia Marina during the conflict

Cruiser Taranto (ex Strassburg)

“Ovunque un raggio della gloria d’Italia”

The Strassburg was launched in Wilhemshave (Germany) in 1911 along with three more units (Magdeburg, Breslau, Stralsund) which made up a class of large explorer. These units were the first in the period to have armor in the form of a vertical belt of 60 mm, a horizontal protection of 50 mm, and a double hull for underwater protection. The power plan included 16 boilers, both coal and fuel oil-fired, and power was distributed over two axles. The original armament included twelve 105/45 mm built by Krupp and four 500-mm torpedo launchers. During World War I, the Kaiserliche Marine altered the ship’s configuration replacing all guns with seven 150/45 mm and two 88/45 mm, but leaving the torpedo launchers. Three of the 150 mm guns were place aft, one forward and one on each side. Four were astern, one to each side of the mast, one immediately astern of the mast and one further down. This layout was, for the time, optimal making for a robust and well-armed ship. The Strassburg was included in the list of ships to be transferred to Italy as part of war reparations, and it was delivered in Cherbourg (France) on July 20th, 1920.

The ship underwent some repair work and alterations; the 88 mm guns were removed and replaced by two 76/40 mm. Later, the torpedo launchers were completely removed. In 1929 the ship, renamed Taranto, was reclassified as a cruiser and began an intense period of activity including several cruises, station duties in the Red Sea, and visits to ports in Spain and Albania. In 1935, the Taranto entered the shipyard for new and more extensive modernization work. The two foremost boilers were removed, along with their corresponding funnel, thus reducing power to 13,000 HP and speed to 21 knots. In addition, the ship was equipped with some antiaircraft guns.
At the beginning of the hostilities, the Taranto already obsolete and heavily worn out, was assigned to the defense of the port of Taranto. After the invasion of Greece, the unit was engaged in numerous bombardment missions along the Adriatic coast, and some mine-laying activities. In 1941, when the invasion of Malta appeared imminent, the unit was to participate to the landing operations, but the mission, for several reasons, never took place. In 1942 the ship war removed from service and on September 9th 1943 was scuttled to avoid capture by the Germans. The Taranto was later salvaged to be utilized as an obstruction near the outer jetty, but after 31 years of service, its carrier was ended by Allied bombing.

Cruiser Bari (ex Pillau)

“Signum victorie victoriam teneat”

The cruiser Bari, part of war reparations from Germany, was delivered to Italy on July 20th, 1920. The ship was originally built for the Russian Navy by the Schichau shipyard of Danzic. At the outbreak of World War I, the ship was incorporated in the German Navy and named Pillau. When delivered to the Regia Marina, the ship was equipped with eight 150/45-mm guns in shielded single mounting and two 88/45-mm guns.
After a few minor changes, the unit was used until 1934 as a training vessel. Later, the Regia Marina decided to transform the ship into a “colonial” cruiser. The six coal-burning boilers were removed along with the foremost funnel. The space was used to build a new oil bunker and more comfortable quarters more suitable for the tropical weather the ship was operate in. Anti-aircraft defenses were augmented with the installation of a few machineguns. At the end of the alterations, the ship was transferred to the Read Sea where it operated until 1937 when the newly built Eritrea replaced it. After her return to Italy, the ship remained under repair until the outbreak of war when it was assigned to the defense of Taranto.

On October 25, 1940, the unit became the flagship for the special naval force engaged in operations against Greece. Here, the Bari was utilized for mine laying and naval bombardment against the Adriatic coast where her German-built guns proved quite effective. In 1941, when the invasion of Malta appeared imminent, the unit was to participate to the landing operations, but the mission, for several reasons, never took place. In 1943, in an attempt of improving convoy escort, the Regia Marina studied a transformation project, which would have equipped the Bari with eight 90-mm guns and several machineguns. While in Livorno to install eight 37/54 mm and eight 20/70-mm guns, the Bari was sunk during an Allied aerial bombardment.

Armored Cruiser San Giorgio

“Tutor et ultor”

Having entered service in 1910, the cruiser San Giorgio saw action in three wars, the Italian-Turkish war, World War I and World War II and, following her sinking, she was awarded the Gold Medal. This ship was the last representative of an older generation of ships, the armored cruisers, the predecessors of the heavy cruisers. She entered service in 1910, and after World War I, was used as a target ship along with her sister ship San Marco. Although when she entered service she was very modern, she was, by World War II, obsolete and no improvement could have made the ship capable of confronting the modern cruisers.

The principal shortcoming, in addition to lack of speed and an antiquated fire control system, was undoubtedly the weak horizontal armor which had been designed to protect the ship against naval guns and could not protect her against aerial bombs. Also missing was any anti-torpedo protection, but the 254 mm and 190 mm guns were still usable, as was her vertical armor.

San Giorgio in 1916

When, in 1937, it was decided to modernize the ship, the Regia Marina opted to transform her into a large monitor for the defense of the African ports. Six boilers were removed, while the remaining eight were modernized, converting them from coal to fuel oil. The two most rear funnels were removed and all guns, excluding the larger 254 mm and 190 mm, were removed. The 76-mm guns were replaced with 100/47 in four twin-shielded mountings installed on specially built platforms near the deckhouse. All minor armaments and the torpedo launchers were also removed.

San Giorgio in Tobruk

When the ship was sent to Tobruk for the defense of the port, an additional twin gun was installed in front of the aft turret of the 254 mm gun, along with several machine guns of both the 37/54 and 20/65 model. Once in Tobruk, the ship’s deck was covered with a layer of sandbags to partially remedy her limited horizontal armor. She also received additional machine guns. After her arrival on May 1940, the ship was fenced in an anti-torpedo netting system. On June 28th 1940, the ship’s antiaircraft guns mistakenly shot down the plane of Italo Balbo, who died in the incident.

The wreckage of Italo Balbo’s plane

From June 12, 1940 the ship remained in a state of full alert 322 times in 212 days. On January 21, after having delayed the incoming British advance into the town rejecting a tank formation using her larger caliber, the ship was condemned to self-destruction. At 4:15 a.m. on January 22, 1941, while British troops had already entered Tobruk, several explosive charges were detonated, thus scuttling the ship. The glorious ship was savaged in 1951 and, while flying the Italian flag on her mast, she was being towed back to Italy when a temporary leak-stopper failed, causing her to sink about 140 miles from Tobruk on July 20th.

• Introduction
• Heavy Cruisers
  • Zara Class
• Light Cruisers

Introduction

The Italian participation to World War I confirmed that the Regia Marina was ready and well trained despite the fact that, due to the will of the Allies, the fruits of victory had been limited. Italian successes were mostly the result of a complete control of the sea and continuous actions of defense and offense conducted under the command of the “Duca degli Abruzzi” and Admiral Thaon de Revel. The peace treaty of 1919 radically changed the balance in the Mediterranean, and although it had given Italy a better position in the Adriatic, it also created a delicate situation in the Mediterranean. This was mostly due to the new French expansions in Morocco and Syria, and the British control over Gibraltar, Egypt and Palestine.

After the failed Naval Conference of Geneva in 1932, where Italy had sought parity with the strongest European continental navy (France), the situation changed due to the Anglo-German and Anglo-Soviet agreements along with changes in Japanese naval policy. Thereafter, the international agreement of naval limitation expired and a period of limitation (Naval Holiday) was followed by almost complete freedom thus causing an escalation in naval rearmament. At this point, even the Italian Navy gave an impetuous boost to new constructions; still it was not allowed to develop the armament which would have most impacted the upcoming conflict: naval aviation. The war in Ethiopia demanded a great effort from the Regia Marina; not much in terms of combat but in logistics. This period of crisis, especially the one with Great Britain, demonstrated the importance of the naval affairs in the life of a country which had expanded to overseas dominions but who was still dependant on the British-controlled Suez canal. This situation should have suggested a different and more appropriate policy, instead it laid the tragic foundations of World War II where naval affairs were to have a great influence. Between 1922 and 1925, the Regia Marina reorganized incorporating German and Austrian ships captured during or obtained after the war, while keeping into consideration the limitations imposed by the Treaty of Washington (1921-22).

After having radiated the older units, the Regia Marina restarted the construction program under a plan originally started by Grand Admiral Thaon de Ravel and continued by Admiral Sirianni. Taking advantage of the progress made in the area of naval contraction during the previous conflict, the first round consisted in the manufacturing of torpedo boats for which the Treaty of Washington had set no limits. Great innovations were introduced in the area of propulsion. Engines, by this time fueled by oil, implemented super heated steam and turbines thus greatly increasing power and capable of obtaining over 30,000 H.P. per axle. At the same time, great developments took place in the area of diesel engines for both surface and submerged vessels. In the field of armaments, all units began installing anti-aircraft guns, while the new 533 mm (21”) torpedo became the standard. Catapults appeared on larger units for the deployment of hydroplanes to be used for tactical reconnaissance and the observation of gunnery. Special attentions were dedicated to the protection of battleships against underwater attacks. In 1932, having completed the first round of constructions, the Regia Marina allowed for the deployment of heavy cruisers of the “Trento” and “Zara” class and light cruisers of the “Condottieri” class.

Trento Class

Also, during this period, began the construction of the destroyers of the “Sella”, “Sauro”, “Turbine” and “Freccia” class and the submarines of the “Balilla”, “Mameli”, “Vector Pisani” and “Argonauta” class. The first large cruisers of the “Washington” class (10,000 British tons and 8” guns) were the “Trento”. Designed and built for speed (this obtained at the price of protection), they were equipped with a light armor belt, while the similarly built French vessels had no protection at all. The Italian “10,000” which took to the sea after the “Trentos” were the “Zara”, units these with greater protection and lesser speed. This class was the best “Washington” built by Italy and had a harmonious balance of armament and protection. The fact that the enemy, in particularly advantageous circumstances, sank three of these units should not diminish their value. For the sake of speed, protection was completely sacrificed on the light cruisers of the “Da Giussano” class. Designed by Rota, these ships were initially designated as “Esploratori” (scout). In 1932, due to the failure of the Conference of Geneva for the limitation and control of the armament, Italy was forced to speed up the strengthening of her Navy. Starting in 1933, to partially reduce its inferiority respect to the French Navy, the Navy decided to radically rebuild the battleships Cesare, Cavour, Duilio and Doria, all veterans of World War I. In 1934-38, as a result of the building up in the international political situation, Italy began the construction of four modern battleships; fast and well armed they were named Vittorio Veneto, Littorio, Roma, and Impero.

Duca degli Abruzzi Class

While the core of the fleet was been rebuilt, Italy placed into service cruisers, and numerous destroyers, torpedo boats and submarines. The last of the sever “10,000”, the Bolzano, was based on the Trentos, but it had much improved characteristics. A clear improvement over the first cruisers of the “Condottieri” class, was the release into service of the units type “Montecuccoli” and “Duca d’Aosta”. Even better were the two “Duca degli Abruzzi”, which during the period 1940-43 proofed themselves strong and with excellent performances. The last improved version of the cruiser class “Condottieri” was not completed, due to the bad turn taken by the war. The Ciano and Venezia would have been based on the “Duca degli Abruzzi” class, thus bringing the total number of light cruisers built by the Regia Marina between the two wars to fourteen. In 1939-40 began the construction of 12 cruisers of the class “Capitani Romani”; ships these with characteristics similar to the “grandi esploratori” (super destroyers) and equipped with efficient anti-torpedo boat and anti-aircraft armament. Constructions of these units were delayed due to the shortage of raw materials during the war, and up to September 8th, 1943, only three units (Attilio Regolo, Scipione Africano, Pompeo Magno) had entered service. In conclusion, the Regia Marina, which had planned to complete its building programs in 1942, entered the war on June 10th, 1940 with about 700,000 tons including 19 modern cruisers, for what was to be the harsh testing ground of World War II.

Heavy Cruisers

In June 1940 the Regia Marina, as it did with its battleships, entered the war with a fleet of relatevely new cruisers. There were still the old San Giorgio, Bari and Taranto (ex Pillau , and ex Strassburg received from the Germans after WW I), but all other units were of the kinds contemplated by the Treaty of Washington. The heavy cruisers had a displacement of 10,000 tons and were armed with guns up to 203 mm (8in); light cruisers had a displacement ranging from 5000 to 9000 tons and guns up to 152 mm (6in).

Bolzano Class

Initially, the Regia Marina followed the trends set by other navies, especially the French one, building the 10,000 tons Trento and Trieste placing more emphasis on speed to the decrement of armor.

The Italian heavy cruisers were built in only two classes: 3 units of the Trento class with 4 propellers and 150,000 HP, and 4 units of the Zara Class with only two propellers and 95,000 HP, but a much heavier armor, almost twice as thick as the one on the Trentos. It is to be noted that the Bolzano, even though like the Trento class had 4 propellers and 150,000 HP, was a much improved version of this class and it took advantage of the operational experience acquired between 1925 and 1930.

Both heavy and light cruisers were equipped with torpedoes at exemption of the Zara class. The Trento class had 4 double launchers in fixed installations. The catapults for airplanes on the Trento, Zara were fixed and place on the most forward part of the bow, while the Bolzano had a single catapult installed between the two funnels.

Zara Class

While the “Trento” class (Trento and Trieste) was still under construction, within the high command Regia Marina dissent began to mount over the choices made during the design phase. Specifically, critics complained that the new cruisers, despite their large displacement (10,000 t, as mandate by the Treaty of Washington, also known as the Five-Power Treaty), were too lightly protected. In essence, protection had been too greatly sacrificed to the benefit of speed: a remarkable 35.6 knots during the 1929 trials. Still the actual operation speed was limited to about 31 knots.

Zara Class

The first heavy cruiser class, the Trento, as well as the later Zara, were the result of an obsession with speed that dated back almost 70 years and that drove the Italian ships to always being a few knots faster than their foreign counterparts. It should be considered that during this period the Regia Marina did not have any operational battleship, thus these heavy cruisers, at least while the older battleships were being rebuilt and the new one built, represented the core of the fleet. Thus, the new cruiser had to be equipped with substantial armor, 200 mm, and the most powerful guns, 203 mm (8”), allowed by the treaty.

Having received a secretive consent from the head of government and the high hierarchy of the Navy to proceed with a project which would exceed the limit set forth by the aforementioned treaty, the “Comitati Progetto Navi” (the bureau in charge of naval constructions) produced a new design. Notwithstanding the original desired requirements, weight limitation (there was a limit to cheating after all) forced a reduction of the armor to 150 mm for the vertical surfaces and 70 mm for the horizontal ones. The main armament was kept at 8, 203 mm guns (8”) but the power plan was reduced from 150,000 to 95,000 HP. Still, the maximum trial speed ranged between 32.9 and 35.2 knots, while the final operational speed equaled the one of the Trento Class at about 31 knots. This high speed was mostly due to the power plan exceeding the requirements set forth by the construction specification by well over 23,000 HP. Thus, the true power for this class should be rated at about 118,000 HP. Most sources still report 95,000 HP.

Unlike the two Trento Class, and later the R.N. Bolzano, which had four shafts, the Zara Class had only two shafts. The Zara Class had eight boilers of the Thornycroft 3-drum type. Two groups of Parsons type, OTO-built, geared turbines moved two three-blade propellers.

At the end, the Regia Marina was to have a total of seven heavy cruisers that, despite their difference in design, could operate jointly. The first of the four new heavy cruisers of this class was the Fiume (build in Trieste), followed by the Zara (La Spezia), and then the Gorizia and Pola (Leghorn). The class was named after four provinces in the Italian northeast (Venezia Giulia). Fiume, Pola and Zara had been added to the territory in 1924, while Gorizia was created in 1927. After the war, all but the last one were lost to Yugoslavia (later Slovenia and Croatia) and renamed Rijeka, Pula and Zadar.

On the Zara class the armor was thick enough to withstand hits from guns equal to her own (they were designed to fight directly other heavy cruisers), resulting in the best armored cruisers in the world at the time. This was an important achievement because the standard for many of the Washington Treaty cruiser was a much lighter armor belt, and even less armor for the turrets and barbettes. Theorists assume that a 150 mm armor plate was not enough to withstand an incoming 203 mm armor piercing naval shell; this theory was never tested on these ships, but during the war, lighter British cruisers kept their distance from these frightening engineering marvels.

To achieve this improved armor, the Zaras were almost 2000 t heavier (as standard displacement) than the limit set forth by the treaty. In addition to the armored main belt, up to 150mm thick, there was also a very thick main deck armor of up to 70mm. Turrets and barbettes were also protected by 100mm armor. In addition to this armor, there was even another series of minor armors: the upper deck was 20mm, and the flank hull above main belt was 30mm. Almost no other cruisers were equipped with two armored decks and two armored belts. This design followed, in fact, not quite a cruiser scheme, but rather the one of a small battleship. A somewhat similar design was later implemented on the Littorio class with the introduction of de-cupping plates. Of course, this was only possible by ignoring the treaty limitations under which other constructors operated with their 203mm cruisers. Only the Des Moines class ended up having heavier armor than the Zara, but these were 17,000 tons units.

)In 1943, the only surviving unit, the R.N. Gorizia, was hit by three bombs launched by American heavy bombers. The main deck resisted the blasts and the ship continued firing during the whole bombardment. This is the only realistic test of the effectiveness of the Zara Class armor since the other three units were lost in the Battle of Matapan in extremely unusual circumstances.

The Zaras were equipped with the new Ansaldo 203 mm 53 caliber guns, models 1927 and 1929. These guns were superior to the Trento 203/50 for rate of fire, but shared the same salvo dispersion issues. While the 203/50s were produced by Ansaldo under industrial agreements with Schneider of France, the new 203/53 were a home-grown project. The projectile’s speed, originally at 930 m/s, was later reduced to 900 m/s to address serious dispersion issues, in addition to an unusually high barrel wear (this was common to many Italian naval guns). Thus, the original range of 31.5 km was also reduced to 29 km. Each turret hosted two guns each with an independent ammunition loading system. The guns could be loaded while elevated, thus increasing the rate of fire. The secondary armament was identical to the previous class of heavy cruisers and consisted of 12 100/47 and 2 120/15. There were also some 8 37/5 and 8 13.2 machine guns. Later, some of the 100/47s were replaced with 37/54 to be used against aircrafts. In general, anti-aircraft protection remained weak.

What might have appeared as an odd design, the installation of an airplane catapult on the aft desk, was instead a well thought out compromise. Since the aircrafts on board were to provide a spotting, rather than defense service, it was not considered useful to be able to catapult planes while the forward guns were in use. Furthermore, the launching of the plane required the ship to be steered into the wind, thus making this operation almost impossible during combat. Initially the Zara received two Piaggio P6 bis reconnaissance seaplanes, later replaced by M41s, then Cant 25 ARs, then M.F.6s, and finally (1938) by Ro. 43s.

At the time of their construction, the Italian Navy did not have radar equipment, thus these ships were not equipped with any such apparatus. Possibly, the Gorizia received one of these installations of the Gufo type around 1943. Fiume and Zara were quite similar, while the Gorizia had a taller and wider forward funnel. The silhouette of the Pola was quite recognizable having the forward funnel integrated with the bridge structure.

At the beginning of the conflict, these four cruisers made up the 1st Cruiser Division which formed the more important squadron of the Regia Marina. The Zara, Gorizia, and Fiume participated in the Battle of Punta Stilo. The Pola, Fiume and Gorizia participated in the Battle of Cape Teulada. As commonly known, all but the Gorizia were lost during the Battle of Matapan. Thereafter, the Gorizia was grouped with the Trento Class units and participated in all major engagements and battles of the Mediterranean. After the already mentioned American bombardment of the Gorizia on April 10th, 1943 in the port of La Maddalena (Sardinia), the unit was sent to La Spezia for repairs and never reentered service. Sabotaged by an Anglo-Italian group of frogmen, its hull was found at the end of the conflict, semi submerged, in the harbor of La Spezia.

Light Cruisers

In June 1940 the Regia Marina, as it did with its battleships, entered the war with a fleet of completely renovated cruisers. There were still the old San Giorgio, Bari and Taranto (ex Pillau , and ex Strassburg received from the Germans after WW I), but all other units were of the kinds contemplated by the Treaty of Washington. The heavy cruisers had a displacement of 10,000 tons and were armed with guns up to 203 mm (8in); light cruisers had a displacement ranging from 5000 to 9000 tons and guns up to 152 mm (6in).

Montecuccoli Class

The light cruisers included four different types, the so called “5000” of the Condottieri class, the “7000” of the Montecuccoli class, the “8000” of the Eugenio di Savoia class to end with the “9000” of the Garibaldi class. During the construction of the first “5000”, the four Di Giussano, Da Barbiano, Colleoni and Bande Nere, as with the Trento, focus was almost exclusively given to speed. Therefore, these units had power plant of 95,000 HP similar to the 10,000 ton Zara class, which propelled these units up to 37 knots. Consequently, armor was very light with only 20-24 mm, completely inadequate to protect the vital organs of the ship against guns of 152 mm of which they were armed. Furthermore, due to the absence of underwater protection, all four units were sunk by enemy attack by means of torpedoes.

The “7,000” of the Montecuccoli class represented an improvement over the “5000”, but shared the same structural deficiencies with the Attendolo loosing its bow to a torpedo attack , and then being sunk in Naples by aerial bombardment. Definitely improved were the subsequent Duca d’Aosta and Eugenio di Savoia and finally the two Garibaldi and Duca degli Abruzzi which represented the completion of the evolution of the Italian light cruiser reaching 10,000 tons and an armament of 10 152mm guns while all other units had only 8. Both heavy and light cruisers were equipped with torpedoes at exemption of the Zara class. The light cruisers of the Condottieri class had 4 double launchers in trainable installations placed on deck near the stern smokestack. Similar layout was present on the Montecuccoli class, but with the launchers placed slighter more forward, at about half way between the two smokestacks.

The Cadorna Class

The Duca d’Aosta and the Garibaldi had instead only 6 launchers in two triple-complexes, placed in the same location on deck. The catapults for airplanes on Di Giussano class were fixed and place on the most forward part of the bow. Instead, the Cadorna, Montecuccoli and the Duca d’Aosta had movable catapults placed between or behind the smokestacks. Finally, the Garibaldi had two catapults placed behind the stern smoke stack.

During the war, the Regia Marina laid down 12 light cruisers of the Attilio Regolo (or Capitani Romani) class, but by September 8, 1943 only three, Attilio Regolo, Pompeo Magno and Scipione Africano had entered service. The remaining units were either scraped or captured by the Germans.

Two anti-aircraft cruisers, the Etna and the Vesuvio were built transforming two units ordered by Siam from the Cantieri Riuniti dell’Adriatico, but never entered service. During the war, the Regia Marina incorporated two French cruisers captured in Toulon, the FR 11, Jean De Vienne, and the FR 12, La Galissonlère but they never entered service.

• Battleships Class Caio Duilio
• Battleships Conte di Cavour Class
• Battleships Littorio or Vittorio Veneto Class

In the years following WW I, following the Treaty of Washington, there was a period of so-called “naval holidays” during which not only the construction of new vessels was stopped, but also existing ones were scrapped. On the basis of this treaty, Italy demolished the four battleships of the Caracciolo class of which one had already been launched and three were laid down.

After this period of standstill, when construction started again, an interesting phenomenon took place; instead of building new ships, most navies remodeled more or less extensively all the units built after the period 1908-1910. Generally, these ships received new machinery, which altered the configuration of the funnels and often the number of propellers. On many ships, the principal armament was replaced, and on most the secondary armament completely replaced thus making it more adept at air defense and involving changes to the forecastle including the installation of new range finding apparatuses and catapults for reconnaissance airplanes.

R.N. Andrea Doria

The Regia marina adapted itself to the trend set by the other navies, and in 1931-32 began studying the radical transformation of 4 battleships of the Conte di Cavour class, ships which were originally built with substantial help from British firms. These transformations were completed in two periods: 1933- 1937 for the Cavour and Cesare and 1937-1940 for Duilio and Doria. More than transformation, we should refer to this work as a reconstruction since of the original ships only the hull and the side armor plates were re-utilized. The hull itself was altered with the installation of a new bow, which increased the overall length, by 10.30 meters. Inside the hull, a new system of defense against torpedo attacks invented by General Pugliese was installed. This installation required the complete removal of all internal structures. The original power plan was replaced, reducing the number of propellers from 4 to 2. The primary and secondary armaments were completely replaced. The triple turret centrally located between the two funnels was also eliminated as were all the pillbox-installed 152 mm and 76mm guns.

The new armament was based on 10 320mm guns on two double and two triple turrets, 12 120mm guns in 6 small turrets and 8 100mm guns on 4 mounts plus minor armament. Three torpedo tubes originally installed under the waterline, were also eliminated. After reconstruction, these could have been considered new ships. During the reconstruction of the 4 old battleships, the Regia Marina began studies on new units based on the dictates of the Treaty of Washington which allowed up to 35,000 tons and guns of up to 406 mm which were rejected in favor of guns of 381 mm.

The project was directed by the General of Naval Constructions Umberto Pugliese, and around October 1934 the first two units, Littorio and Vittorio Veneto were contracted, and entered service in 1940. In 1938, two more units were contracted, Roma and Impero, but only the first was completed in June 1942, while the second one was abandoned during construction in September 1943 and never completed.

R.N. Vittorio Veneto.

The battleship of the Littorio class, which in 1943 was renamed Italia, were the only Italian battleships armed with triple turrets, two forward and one aft, configuration typical of those of other navies. These ships had a power plant capable of generating 140,000 HP distributed over 4 propellers, while the Cavour had only 93,000 HP over 2 propellers. These new units, both for their seagoing and fighting performances, were comparable to those of other navies. Unfortunately, they were not equipped with RADAR. While the protection of the Cavour class battleships was the original dating back to 1914-15, the new units had a more modern armor similar to the one adopted by other navies such as in the British battlecruiser H.M.S. Hood, the battleships H.M.S. Nelson and H.M.S. Rodney, the German Graf Spee, the French Richelieu, or the Japanese Yamato.

The armour was not built by vertical plates, like the Cavour, but by two layers of plates placed an at angle protruding on the high part and caving on the lower one. The external plate was 350mm thick and at about 600mm a second armor of about 36mm served as a shield against shrapnel. The horizontal armor was designed against the new aerial bombs and was organized over three bridges. This protection was inadequate against the new German rocket bombs, which were able to penetrate the vital parts of the battleship Roma and blow it apart.

Underwater defenses were particularly taken care of, on both the Cavour and Littorio class with the adoption of an “absorbent structure” invented by General Umberto Pugliese. This structure was made of a large cylinder of low resistance contained in a stronger structure filled with liquid and completely surrounding the inner cylinder. The explosion of a torpedo was to cause the external bulkhead to give way and the pressure generated by the explosion would be transferred by the liquid and absorbed by the internal cylinder thus preventing damage to the internal bulkhead.

Partially adapted and translated from the book “Guida alle navi d’Italia”, by Gino Galuppini, published in 1982 by Arnoldo Mondadori Editore.

Vessel	Call Sign	Class	Type	Shipyard	Laid Down	Launched	Comm.	Fate	On
Abastro		Abastro	Minesweeper	Neptun, Rostok
Acciaio	AC	Platino	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	11/21/1940	6/22/1941	10/30/1941	Sunk	7/13/1943
Acquilone	AL	Turbine	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	5/18/1925	8/3/1927	12/3/1927	Sunk	7/27/1940
Adua	AD	Adua	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/1/1936	9/13/1936	11/14/1936	Sunk	9/30/1941
Airone	AO	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	10/29/1936	1/23/1938	5/10/1938	Sunk	10/12/1940
Alabarda		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/24/1943	5/7/1944	11/27/1944	Captured	9/9/1943
Alabastro	AB	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/14/1941	12/18/1941	5/9/1942	Sunk	9/14/1942
Alagi	AL	Adua	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/19/1936	11/15/1936	3/6/1937	Removed from Service	9/9/1943
Alce	C 23	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	5/27/1942	12/5/1942		Captured	9/9/1943
Alcione	AC	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	10/29/1936	12/23/1937	5/10/1938	Sunk	12/11/1941
Alderaban	AL	Spica tipo Perseo	Torpedo Boat	Ansaldo, Sestri Levante	10/2/1935	6/14/1936	6/12/1936	Sunk	10/24/1941
Alfredo Oriani	OA	Oriani	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	10/28/1935	7/30/1936	7/15/1937	Transferred	1/1/1948
Aliseo	AS	Orsa 2a Serie	Torpedo Boat	Navalmeccanica, Castellammare	9/16/1941	9/20/1942	2/28/1943
Alpino	AP	Soldati 1a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	5/2/1937	9/8/1938	4/20/1939	Sunk	4/19/1943
Altair	AT	Spica tipo Perseo	Torpedo Boat	Ansaldo, Sestri Levante	10/2/1935	7/26/1936	12/23/1936	Sunk	10/20/1941
Ambra	PL	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	8/28/1935	5/28/1936	8/4/1936	Scuttled	9/9/1943
Ametista	AA	Sirena	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	9/16/1931	4/26/1933	4/1/1934	Scuttled	9/12/1943
Andrea Doria		Duilio	Battleship	Arsenale Navale, La Spezia	4/1/1937	10/26/1940	10/26/1940	Removed from Service	6/15/1956
Andromeda	AD	Spica tipo Perseo	Torpedo Boat	Ansaldo, Sestri Levante	10/2/1935	6/28/1936	12/6/1936	Sunk	3/17/1941
Anfitrite	AN	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	7/11/1931	7/5/1933	3/22/1934	Scuttled	3/6/1941
Animoso	AM	Orsa 2a Serie	Torpedo Boat	Ansaldo, Sestri Levante	4/3/1941	4/15/1942	8/14/1942
Antares	AN	Spica tipo Perseo	Torpedo Boat	Ansaldo, Sestri Levante	10/2/1935	7/19/1936	12/23/1936	Sunk	5/28/1943
Antilope	C 19	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	1/20/1942	5/9/1942	11/11/1942	Captured	9/9/1943
Ape	C 25	Gabbiano	Corvette	Navalmeccanica, Castellammare	5/6/1942	11/22/1942	5/15/1943
Aquila		Aquila	Aircraft Carrier	Ansaldo, Sestri Levante				Captured	9/8/1943
Aradam	AR	Adua	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/14/1936	10/18/1936	1/16/1937	Scuttled	9/9/1943
Arbe ()		Arbe	Minelayer	Kraljevica, Jugoslavia
Archimede	AH	Brin	Submarine – Oceanic	Tosi, Taranto	12/23/1937	3/5/1939	4/18/1939	Sunk	4/15/1943
Ardea	C 54	Gabbiano	Corvette	Ansaldo, Sestri Levante	3/15/1943			Captured	9/9/1943
Ardente	AD	Orsa 2a Serie	Torpedo Boat	Ansaldo, Sestri Levante	4/7/1941	5/27/1942	9/30/1942	Wrecked	1/12/1943
Ardimentoso	AT	Orsa 2a Serie	Torpedo Boat	Ansaldo, Sestri Levante	4/7/1941	6/28/1942	12/14/1942
Ardito	AR	Orsa 2a Serie	Torpedo Boat	Ansaldo, Sestri Levante	4/3/1941	3/14/1942	6/30/1942	Captured	9/16/1943
Aretusa	AU	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	10/26/1936	2/6/1938	7/1/1938
Argento	AG	Platino	Submarine – Coastal	Tosi, Taranto	4/30/1941	2/22/1942	5/16/1942	Scuttled	8/3/1943
Argo	AO	Argo	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	12/9/1935	11/24/1936	8/31/1937	Scuttled	9/10/1943
Argonauta	AU	Argonauta	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/9/1929	1/19/1931	1/14/1932	Sunk	6/29/1940
Ariel	AE	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	10/29/1936	3/14/1938	7/1/1938	Sunk	10/12/1940
Ariete		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	3/6/1943	8/5/1943
Artemide	C 39	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/9/1942	8/10/1942	10/10/1942	Captured	9/9/1943
Artigliere	AR	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	2/15/1937	12/12/1937	11/14/1938	Sunk	10/12/1940
Arturo		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	3/27/1943	10/4/1943	Captured	9/9/1943
Ascari	AI	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	12/11/1937	7/31/1938	5/6/1939	Sunk	3/24/1943
Ascianghi	AS	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/20/1937	7/5/1937	3/25/1938	Sunk	7/23/1943
Asteria	AE	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/16/1940	5/25/1941	11/8/1941	Sunk	2/17/1943
Atropo	AT	Foca	Submarine – Medium Range	Tosi, Taranto	7/10/1937	11/20/1938	2/14/1939	Stricken	9/9/1943
Augusto Riboty	RI	Maestrale	Destroyer	Ansaldo, Sestri Levante	2/27/1915	9/24/1916	5/5/1917	Transferred
Auriga		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	4/15/1943	12/28/1943	Captured	9/9/1943
Aviere	AV	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	1/16/1937	9/19/1937	8/31/1938	Sunk	12/17/1942
Avorio	AV	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/9/1940	9/6/1941	3/25/1942	Sunk	2/9/1943
Axum	AX	Adua	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/8/1936	9/27/1936	12/2/1936	Scuttled	12/28/1943
Azio		Ostia	Minelayer	Cantiere Navale Riuniti (C.N.R.) Ancona
Azio		Ostia	Mine Layer	Cantiere Navale Riuniti (C.N.R.) Ancona	1/1/1925	1/1/1927
Alpino Bagnolini	BI	Liuzzi	Submarine – Oceanic	Tosi, Taranto	12/15/1938	10/28/1939	12/22/1939	Captured	3/11/1943
Baiamonti	BM	Bajamonti	Submarine – Coastal	Loires, Nantes (France)	1/1/1927	12/1/1928	12/2/1928	Scuttled	9/9/1943
Baionetta	C 34	Gabbiano	Corvette	Breda, Venezia	2/24/1942	10/5/1942	5/15/1943
Baleno	BO	Dardo 2a Serie	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	10/1/1929	3/22/1931	6/15/1932	Sunk	4/17/1941
Balestra		Ariete	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	9/5/1943
Balilla	BL	Balilla	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/12/1925	2/20/1927	7/20/1928	Stricken	4/28/1941
Fratelli Bandiera	BA	Bandiera	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/11/1928	7/7/1929	6/2/1930	Stricken	9/9/1943
Maggiore Baracca	BG	Marconi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	3/1/1939	4/21/1940	7/10/1940	Sunk	9/8/1941
Barbarigo	BO	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/6/1937	6/12/1938	9/19/1938	Sunk	6/16/1943
Bari (ex Pillau)		Bari	Obsolete Ship	Schichau, Danzig (Germany)	12/31/1912	4/4/1914	12/14/1914	Sunk	6/28/1943
Angelo Bassini		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Cesare Battisti	BT	Sauro	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	2/9/1924	12/11/1926	4/13/1927	Scuttled	4/3/1941
Bausan	BN	Pisani	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/20/1926	3/24/1928	9/15/1929	Removed from Service	11/8/1941
Beilul	BU	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	7/2/1937	5/22/1938	9/14/1938	Sunk	9/9/1943
Berenice	C 66	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/1/1942	4/21/1943	8/1/1943
Berillo	BE	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/14/1935	6/14/1936	8/5/1936	Scuttled	10/2/1940
Bersagliere	BG	Soldati 1a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	4/21/1937	7/3/1938	4/1/1939	Sunk	1/7/1943
Antonio Biamonti (ex Smeli)		Osvetnik	Submarine – Coastal	Loires, Nantes (France)		12/1/1928	4/1/1941	Scuttled	8/9/1943
Michele Bianchi	BH	Marconi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	2/15/1939	12/3/1939	4/15/1940	Sunk	7/5/1941
Bolzano		Bolzano	Cruiser – Heavy	Ansaldo, Sestri Levante	6/11/1930	8/31/1932	8/19/1933	Sunk	6/22/1944
Bombarda	C 38	Gabbiano	Corvette	Breda, Venezia	8/31/1942			Captured	9/11/1943
Bombardiere	BR	Soldati 2a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	10/7/1940	3/23/1942	7/15/1942	Sunk	1/17/1943
Borea	BR	Turbine	Destroyer	Ansaldo, Sestri Levante	4/29/1925	1/28/1927	11/24/1927	Sunk	7/17/1940
Marcantonio Bragadin	BG	Bragadin	Submarine – Minelaying	Tosi, Taranto	2/2/1927	7/21/1929	11/16/1931	Stricken	9/9/1943
Brin	BR	Brin	Submarine – Oceanic	Tosi, Taranto	12/3/1936	4/3/1938	6/30/1938	Stricken	9/9/1943
Bronzo	BZ	Platino	Submarine – Coastal	Tosi, Taranto	12/2/1940	9/28/1941	1/2/1942	Captured	7/12/1943
Buccari		Fasana	Minelayer	Navalmeccanica, Castellammare
CA 1		CA I	Submarine – Midget	Caproni Taliedo			4/15/1938	Scuttled	9/9/1943
CA 2		CA I	Submarine – Midget	Caproni Taliedo				Captured	9/9/1943
CA 3		CA I	Submarine – Midget	Caproni Taliedo				Removed from Service	9/9/1943
CA 4		CA I	Submarine – Midget	Caproni Taliedo				Removed from Service	9/9/1943
Ammiraglio Cagni	CA	Ammiragli	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/16/1939	7/20/1940	8/21/1941	Removed from Service	9/9/1943
Calabrone	C 30	Gabbiano	Corvette	Navalmeccanica, Castellammare	10/1/1942	6/27/1943		Captured	9/9/1943
Calipso	CI	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	9/29/1937	6/12/1938	11/16/1938	Sunk	12/5/1940
Calliope	CP	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	5/26/1937	4/15/1938	10/28/1938
Pietro Calvi	CV	Calvi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	7/20/1932	3/3/1935	10/16/1935	Scuttled	7/15/1942
Camicia Nera	CN	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	1/21/1937	8/8/1937	6/30/1938	Transferred	2/21/1949
Camoscio	C 21	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	1/25/1942	5/9/1942	4/18/1943
Canopo	CA	Spica tipo Climene	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	12/10/1935	10/1/1936	3/31/1937	Sunk	5/3/1941
Comandante Cappellini	CL	Marcello	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	4/25/1938	5/14/1939	9/23/1939	Captured	9/8/1943
Pier Capponi	CP	Mameli	Submarine – Medium Range	Tosi, Taranto	8/27/1925	6/19/1927	1/20/1929	Sunk	3/31/1941
Capriolo	C 22	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	6/3/1942	12/5/1942		Captured	9/9/1943
Carabina	C 37	Gabbiano	Corvette	Breda, Venezia	9/28/1942	8/31/1943		Captured	9/11/1943
Carabiniere	CB	Soldati 1a Serie	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	2/1/1937	7/23/1937	12/20/1938	Removed from Service	1/18/1965
Ammiraglio Caracciolo	CC	Ammiragli	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/16/1939	10/16/1940	9/15/1941	Sunk	12/11/1941
Carlo Mirabello	MI	Maestrale	Destroyer	Ansaldo, Sestri Levante	11/21/1914	12/21/1915	8/24/1916	Sunk	5/21/1941
Ermanno Carlotto		Carlotto	River Gunboat	Shangai Dode Engineering	1/1/1920	1/1/1921	1/1/1921	Captured	8/9/1943
Carrista	CR	Soldati 2a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	9/11/1941			Removed from Service
Cassiopea	CS	Spica tipo Climene	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	12/10/1935	11/22/1936	4/26/1937
Castelfitardo		Curtatone	Destroyer	Orlando, Livorno	1/1/1920	1/1/1922	1/1/1923	Captured	1/1/1943
Castore	CT	Spica tipo Climene	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	1/25/1936	9/27/1936	1/16/1937	Sunk	6/2/1943
Catalafimi		Curtatone	Destroyer	Orlando, Livorno	1/1/1920	1/1/1922	1/1/1923	Captured	1/1/1943
Cavalletta	C 31	Gabbiano	Corvette	Navalmeccanica, Castellammare	3/12/1942
Conte di Cavour		Cavour	Battleship	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/1/1933	6/1/1937	10/1/1937	Removed from Service	12/15/1948
CB 1		CB	Submarine – Coastal	Caproni Taliedo			1/27/1941	Transferred	9/9/1943
CB 10		CB	Submarine – Coastal	Caproni Taliedo			8/1/1943	Removed from Service
CB 11		CB	Submarine – Coastal	Caproni Taliedo			8/24/1943	Scuttled	9/11/1943
CB 12		CB	Submarine – Coastal	Caproni Taliedo			8/24/1943	Scuttled	9/11/1943
CB 13		CB	Submarine – Coastal	Caproni Taliedo				Sunk	3/23/1945
CB 14		CB	Submarine – Coastal	Caproni Taliedo				Sunk
CB 15		CB	Submarine – Coastal	Caproni Taliedo				Sunk
CB 16		CB	Submarine – Coastal	Caproni Taliedo				Surrendered
CB 17		CB	Submarine – Coastal	Caproni Taliedo				Sunk	4/3/1945
CB 18		CB	Submarine – Coastal	Caproni Taliedo				Sunk	3/31/1945
CB 19		CB	Submarine – Coastal	Caproni Taliedo				Captured
CB 2		CB	Submarine – Coastal	Caproni Taliedo			1/27/1941	Transferred	9/9/1943
CB 20		CB	Submarine – Coastal	Caproni Taliedo				Captured
CB 21		CB	Submarine – Coastal	Caproni Taliedo				Sunk	4/29/1945
CB 22		CB	Submarine – Coastal	Caproni Taliedo				Captured
CB 3		CB	Submarine – Coastal	Caproni Taliedo			5/10/1941	Transferred	9/9/1943
CB 4		CB	Submarine – Coastal	Caproni Taliedo			5/10/1941	Transferred	9/9/1943
CB 5		CB	Submarine – Coastal	Caproni Taliedo			5/10/1941	Sunk	6/13/1942
CB 6		CB	Submarine – Coastal	Caproni Taliedo			5/10/1941	Transferred	9/9/1943
CB 7		CB	Submarine – Coastal	Caproni Taliedo			8/1/1943	Removed from Service
CB 8		CB	Submarine – Coastal	Caproni Taliedo			8/1/1943	Removed from Service
CB 9		CB	Submarine – Coastal	Caproni Taliedo			8/1/1943	Removed from Service
Centauro	CO	Spica tipo Climene	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	5/30/1934	2/19/1936	6/16/1936	Sunk	11/4/1942
Cernia		Tritone	Submarine – Coastal	Tosi, Taranto	7/12/1943			Stricken
Cervo	C 56	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	2/25/1943
Giulio Cesare		Cavour	Battleship	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	10/1/1933	10/1/1937	6/2/1937	Removed from Service	2/15/1945
Chimera	C 48	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/27/1942	1/30/1943	5/26/1943
Cicala	C 29	Gabbiano	Corvette	Navalmeccanica, Castellammare	9/30/1942	6/27/1943		Captured	9/9/1943
Ciclone	CI	Orsa 2a Serie	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/9/1941	3/1/1942	5/21/1942	Sunk	3/8/1943
Cicogna	C 15	Gabbiano	Corvette	Ansaldo, Sestri Levante	6/15/1942	10/12/1942	1/11/1943	Wrecked	7/24/1943
Cigno	CG	Spica tipo Climene	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	3/11/1936	11/24/1936	3/15/1937	Sunk	4/16/1943
Circe	CC	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	9/29/1937	6/29/1938	10/4/1938	Sunk	11/27/1942
Clava	C 63	Gabbiano	Corvette	Breda, Venezia	10/20/1943
Climene	CE	Spica tipo Climene	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	7/25/1934	1/7/1936	4/24/1936	Sunk	4/28/1943
Clio	CL	Spica tipo Alcione	Torpedo Boat	Ansaldo, Sestri Levante	10/29/1936	4/3/1938	10/2/1938
Cobalto	CB	Platino	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	11/26/1940	8/20/1941	3/18/1942	Sunk	8/12/1942
Cocciniglia	C 61	Gabbiano	Corvette	Navalmeccanica, Castellammare
Cofienza		Palestro	Destroyer	Orlando, Livorno
Battolomeo Colleoni		Condottieri tipo Di Giussano	Cruiser – Light	Ansaldo, Sestri Levante	6/21/1928	12/21/1930	2/10/1932	Sunk	7/19/1940
Marcantonio Colonna	CN	Pisani	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/12/1925	12/26/2027	7/10/1929	Removed from Service	6/1/1942
Colubrina	C 35	Gabbiano	Corvette	Breda, Venezia	3/14/1942	12/7/1942		Captured	9/11/1943
Corallo	CO	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/1/1935	8/2/1936	9/26/1936	Sunk	12/13/1942
Corazziere	CZ (CR)	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	10/7/1937	5/22/1938	3/4/1939	Scuttled	9/9/1943
Cormorano	C 13	Gabbiano	Corvette	Societa Anonima Cantieri Cerusa, Genova-Voltri	1/14/1942	9/20/1942	3/6/1943
Corridoni	CR	Bragadin	Submarine – Minelaying	Tosi, Taranto	7/4/1927	3/30/1930	11/17/1931	Stricken	9/8/1943
Corsaro	CA	Soldati 2a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	1/23/1941	11/16/1941	5/16/1942	Sunk	1/9/1943
Enrico Cosenz		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Crisalide	C 58	Gabbiano	Corvette	Navalmeccanica, Castellammare
Curtatore		Curtatone	Destroyer	Orlando, Livorno	1/1/1920	1/1/1922	1/1/1923	Sunk	1/1/1941
D1		D1	Minesweeper	Cantiere Navale Riuniti (C.N.R.) Ancona
D10 (ex TB36)		D10	Minesweeper	Cantieri Navali del Quarnaro (C.N.Q.), Fiume
Alberico da Barbiano		Condottieri tipo Di Giussano	Cruiser – Light	Ansaldo, Sestri Levante	4/16/1928	8/23/1930	6/9/1931	Sunk	12/13/1941
Alberto da Giussano		Condottieri tipo Di Giussano	Cruiser – Light	Ansaldo, Sestri Levante	3/29/1928	4/27/1930	2/5/1931	Sunk	12/31/1941
Alvise Da Mosto	DM	Navigatori	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	8/22/1928	7/1/1929	3/15/1931	Sunk	12/1/1941
Antonio Da Noli	DN	Navigatori	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	7/25/1927	5/21/1929	12/29/1929	Sunk	7/9/1943
Da Procida	DP	Mameli	Submarine – Medium Range	Tosi, Taranto	9/21/1925	4/1/1928	1/20/1929	Stricken	9/8/1943
Nicoloso Da Recco	DR	Navigatori	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	12/14/1927	1/5/1930	5/20/1930	Removed from Service	7/15/1954
Leonardo Da Vinci		Marconi	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/19/1938	9/16/1939	3/8/1940	Sunk	5/23/1943
Daga		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/9/1943	7/15/1943	3/27/1944	Captured	9/9/1943
Dagabur	DA	Adua	Submarine – Coastal	Tosi, Taranto	4/16/1936	9/22/1936	4/9/1937	Sunk	8/12/1942
Daino	C 55	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	3/1/1943
Danaide	C 44	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/9/1942	10/21/1942	2/27/1943
Dandolo	DO	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/14/1937	9/20/1937	3/25/1938	Stricken	9/8/1943
Dardanelli		Ostia	Mine Layer	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/1/1925	1/1/2925
Dardanelli		Ostia	Minelayer	Stabilimento Tecnico Triestino, Trieste
Dardo	DA	Dardo 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	1/23/1929	7/6/1930	1/25/1932	Captured	9/9/1943
Delfino	DL	Squalo	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/27/1928	4/27/1930	6/19/1930	Sunk	3/23/1943
Dentice		Tritone	Submarine – Coastal	Tosi, Taranto	7/23/1943			Stricken
Des Geneys	DN	Pisani	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/1/1926	6/14/1928	10/31/1929	Removed from Service	5/28/1943
Dessiè	DE	Adua	Submarine – Coastal	Tosi, Taranto	4/20/1936	11/22/1936	4/14/1937	Sunk	11/28/1942
Diamante	DI	Sirena	Submarine – Coastal	Tosi, Taranto	5/11/1931	5/21/1933	6/18/1933	Sunk	6/20/1940
Diana		Diana	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	5/31/1939	5/20/1940	11/12/1940	Sunk	6/29/1942
Diaspro	DS	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/21/1935	7/5/1936	8/28/1936	Stricken	9/8/1943
Armando Diaz		Condottieri tipo Cadorna	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	7/28/1930	7/10/1932	4/29/1933	Sunk	2/25/1941
Dragone		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	8/14/1943	4/3/1944	Captured	9/9/1943
Driade	C 43	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/9/1942	10/7/1942	1/14/1943
Emanuele Filiberto Duca d’Aosta		Condottieri tipo Duca di Aosta	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Livorno	10/29/1932	4/22/1934	3/17/1935	Removed from Service	2/12/1949
Caio Duilio		Duilio	Battleship	Navalmeccanica, Castellammare	4/8/1937	7/15/1940	7/15/1940	Removed from Service	11/1/1956
Durazzo		Fasana	Minelayer	Navalmeccanica, Castellammare
Durbo	DU	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	3/8/1937	3/6/1938	7/1/1938	Scuttled	10/18/1940
Egeria	C 67	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/15/1943	7/3/1943		Captured	9/9/1943
Emo	EO	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/16/1937	6/29/1938	10/14/1938	Sunk	11/10/1942
Eridano		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	7/12/1943	3/4/1944	Captured	9/9/1943
Eritrea		Eritrea	Corvette	Navalmeccanica, Castellammare	7/25/1935	9/20/1936	2/10/1937
Espero	ES	Turbine	Destroyer	Ansaldo, Sestri Levante	4/29/1925	8/31/1927		Sunk	6/28/1940
Etna		Etna	Cruiser – Light	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/23/1939	5/28/1942
Eugenio di Savoia		Condottieri tipo Duca di Aosta	Cruiser – Light	Ansaldo, Sestri Levante	7/6/1933	3/16/1935	1/16/1936	Removed from Service	6/26/1951
Euridice	C 70	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	7/1/1943
Euro	ER	Turbine	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	1/24/1925	7/7/1927	12/22/1927	Sunk	10/1/1943
Euterpe	C 41	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	4/2/1942	10/22/1942	1/20/1943	Scuttled	9/9/1943
Comandante Faa Di Bruno	FB	Marcello	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	4/28/1938	6/18/1939	10/23/1939	Sunk	10/31/1940
Nicola Fabrizi		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Farfalla	C 59	Gabbiano	Corvette	Navalmeccanica, Castellammare
Fasana		Fasana	Minelayer	Navalmeccanica, Castellammare
Fenice	C 50	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/27/1942	3/1/1943	6/15/1943
Ferraris	FE	Galilei	Submarine – Medium Range	Tosi, Taranto	10/15/1931	8/11/1934	1/31/1935	Scuttled	10/25/1941
Ettore Fieramosca	FM	Fieramosca	Submarine – Oceanic	Tosi, Taranto	7/17/1926	6/14/1929	12/5/1931	Stricken	3/1/1943
Giuseppe Finzi	FZ	Calvi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	8/1/1932	6/29/1935	1/8/1936	Sunk	9/8/1943
Fionda		Ariete	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	8/26/1942
Fisalia	FS	Argonauta	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/20/1929	5/2/1931	6/4/1932	Sunk	9/28/1941
Fiume		Zara	Cruiser – Heavy	Stabilimento Tecnico Triestino, Trieste	4/29/1929	4/27/1930	11/23/1931	Sunk	3/28/1941
Flora	C 46	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/16/1942	12/1/1942	4/26/1943
Flutto	FL	Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	12/1/1941	9/19/1942	3/20/1943	Sunk	7/11/1943
Foca	FO	Foca	Submarine – Medium Range	Tosi, Taranto	1/15/1936	6/27/1937	11/6/1937	Sunk	10/15/1940
Folaga	C 16	Gabbiano	Corvette	Ansaldo, Sestri Levante	6/15/1942	11/14/1942	2/16/1943
Folgore	FG	Dardo 2a Serie	Destroyer	Partenopei, Napoli	1/30/1930	4/26/1931	7/1/1932	Sunk	12/2/1942
Fortunale	FT	Orsa 2a Serie	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/9/1941	4/18/1942	8/16/1942
FR 11 (ex jean de Vienne)		FR11	Cruiser – Light	Arsenal de la Marine, Lorient
FR 111		FR 111	Submarine – Medium Range	Arsenal de Brest (France)	1/1/1924	3/16/1926	1/20/1943	Sunk	2/28/1943
FR 12 (ex La Galissoniere)		FR12	Cruiser – Light	Arsenal de la Marine, Lorient
Francesco Crispi	CP (CR)	Sella	Destroyer	Pattison, Napoli	2/21/1923	9/12/1925	4/29/1927	Captured
Francesco Nullo	NL	Sauro	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	10/9/1924	11/14/1925	4/15/1927	Sunk	10/21/1940
Francesco Stocco		Sirtori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Fratelli Cairoli		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Freccia	FR	Dardo 1a Serie	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	2/20/1929	8/3/1930	10/21/1931	Sunk	8/8/1943
Fuciliere	FC	Soldati 1a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	5/2/1937	7/31/1938	2/10/1939	Transferred	1/17/1950
Fulmine	FL	Dardo 2a Serie	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	10/1/1929	8/2/1931	7/14/1932	Sunk	11/9/1941
Gabbiano	C 11	Gabbiano	Corvette	Societa Anonima Cantieri Cerusa, Genova-Voltri	1/14/1942	6/23/1942	10/3/1942
Galatea	GT	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	7/18/1931	5/5/1933	6/25/1934	Removed from Service	9/9/1943
Galilei	GL	Galilei	Submarine – Medium Range	Tosi, Taranto	10/15/1931	3/19/1934	10/16/1934	Captured	6/19/1940
Galvani	GA	Brin	Submarine – Oceanic	Tosi, Taranto	12/3/1936	5/22/1938	7/29/1938	Sunk	6/24/1940
Gazzella	C 20	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	1/22/1942	5/9/1942	2/6/1943	Sunk	8/5/1943
Gemma	GE	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/7/1935	5/21/1936	7/8/1936	Sunk	10/8/1940
Generale Achille Papa		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Generale Antonio Cantone		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Generale Antonio Cascino		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Generale Antonio Chinotto		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Generale Carlo Montanari		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Generale Marcello Prestinari		Cantone	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Geniere	GE	Soldati 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	8/26/1937	2/27/1938	12/14/1938	Sunk	3/1/1943
Ghibli	GH	Orsa 2a Serie	Torpedo Boat	Navalmeccanica, Castellammare	8/30/1941	2/28/1943	7/24/1943	Captured	9/9/1943
Giacinto Carini		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giacomo Medici		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giada	GD	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/16/1940	6/10/1941	12/8/1941	Removed from Service	9/9/1943
Giosue’ Carducci	CD	Oriani	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	2/5/1936	10/28/1936	11/1/1937	Sunk	4/28/1941
Giovanni Acerbi		Sirtori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giovanni Berta		Giuseppe Biglieri	Minesweeper	Schiffbau G.S., Bremerhaven
Giovanni Da Verazzano	DV	Navigatori	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	8/17/1927	12/15/1928	7/25/1930	Sunk	10/19/1942
Giovanni dalle Bande Nere		Condottieri tipo Di Giussano	Cruiser – Light	Navalmeccanica, Castellammare	10/31/1928	4/27/1930	4/1/1931	Sunk	4/1/1942
Giovanni Nicotera	NC	Sella	Destroyer	Pattison, Napoli	5/6/1925	6/24/1926	1/8/1927	Transferred	3/1/1940
Ernestro Giovannini		Andrea Bafine	Escort Gunboat	Pattison, Napoli	1/1/1920	1/1/1922	1/1/1922	Stricken
Reginaldo Giuliani	GN	Liuzzi	Submarine – Oceanic	Tosi, Taranto	3/13/1939	12/3/1939	2/3/1940	Captured	9/8/1943
Giulio Germanico		Capitani Romani	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Livorno	4/3/1939	7/26/1941	11/9/1943
Giuseppe Biglieri		Giuseppe Biglieri	Minesweeper	Schiffbau G.S., Bremerhaven
Giuseppe Cesare Abba		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giuseppe Dezza		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente				Captured	9/8/1943
Giuseppe Garibaldi		Condottieri tipo Duca degli Abruzzi	Cruiser – Light	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/12/1933	4/21/1936	12/20/1937	Removed from Service	5/1/1961
Giuseppe La Farina		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giuseppe La Masa		La Masa	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Giuseppe Missori		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente				Captured	9/8/1943
Giuseppe Sirtori		Sirtori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Gladio		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/9/1943	6/15/1943	1/8/1944	Captured	9/9/1943
Glauco	GU	Glauco	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/10/1933	1/5/1935	9/20/1935	Scuttled	6/27/1941
Gondar	GO	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	2/1/1936	9/13/1936	11/14/1936	Scuttled	9/30/1940
Gorgo	GG	Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/15/1941	1/30/1942	11/11/1942	Sunk	5/21/1943
Gorizia		Zara	Cruiser – Heavy	Odero-Terni-Orlandi (O.T.O.), Livorno	3/17/1930	12/28/1930	12/23/1931	Captured	9/8/1943
Granatiere	GN	Soldati 1a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	4/5/1937	4/24/1938	2/1/1939	Removed from Service	7/1/1958
Granito	GR	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/9/1940	8/5/1941	3/31/1942	Sunk	11/9/1942
Grecale	GR	Maestrale	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	9/25/1931	6/17/1934	11/15/1934	Removed from Service	5/31/1964
Grillo	C28	Gabbiano	Corvette	Navalmeccanica, Castellammare	6/22/1942	3/21/1943		Captured	9/9/1943
Gronco		Tritone	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	5/15/1941	1/30/1942	11/11/1942	Scuttled	9/9/1943
Groppo	GP	Orsa 2a Serie	Torpedo Boat	Navalmeccanica, Castellammare	6/18/1941	4/19/1942	8/31/1942	Sunk	5/25/1943
Gru	C 18	Gabbiano	Corvette	Ansaldo, Sestri Levante	7/6/1942	12/23/1942	4/29/1943
Guglielmotti	GI	Brin	Submarine – Oceanic	Tosi, Taranto	12/3/1936	9/11/1938	10/12/1938	Sunk	3/17/1942
H1		Holland	Submarine – Coastal	Electric Boat Company, (Canada)	1/1/1916	1/1/1916
H2		Holland	Submarine – Coastal	Electric Boat Company, (Canada)	1/1/1916	1/1/1916
H4		Holland	Submarine – Coastal	Electric Boat Company, (Canada)	1/1/1916	1/1/1917
H6		Holland	Submarine – Coastal	Electric Boat Company, (Canada)	1/1/1916	1/1/1916
H8		Holland	Submarine – Coastal	Electric Boat Company, (Canada)	1/1/1916	1/1/1916
Ibis	C 17	Gabbiano	Corvette	Ansaldo, Sestri Levante	6/18/1942	12/12/1942	4/3/1943
Impavido	IM	Orsa 2a Serie	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	8/15/1941	2/24/1943	4/30/1943	Captured	9/16/1943
Impero		Littorio	Battleship	Ansaldo, Sestri Levante	5/14/1938	11/15/1940
Impetuoso	IP	Orsa 2a Serie	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	8/15/1941	4/20/1943	6/7/1943	Scuttled	9/11/1943
Indomito	ID	Orsa 2a Serie	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	1/10/1942	7/6/1943	8/4/1943
Intrepido	IT	Orsa 2a Serie	Torpedo Boat	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	1/31/1942	9/8/1943	1/16/1944	Captured	9/9/1943
Ippolito Nievo		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente				Removed from Service	1/1/1938
Iride	IR	Perla	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	9/3/1935	7/30/1936	11/6/1936	Sunk	8/22/1939
Jalea	IA	Argonauta	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/20/1930	6/15/1932	3/16/1933	Removed from Service	9/9/1942
Jantina	IN	Argonauta	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/20/1930	5/16/1932	3/1/1933	Sunk	7/5/1940
Lafolè	LF	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	6/30/1937	4/10/1938	8/13/1938	Sunk	10/20/1939
Lampo	LP	Dardo 2a Serie	Destroyer	Partenopei, Napoli	1/30/1930	7/26/1931	8/13/1932	Sunk	4/30/1943
Lancia		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/24/1943	5/7/1944	9/7/1944	Captured	9/9/1943
Lanciere	LN	Soldati 1a Serie	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	2/1/1937	12/18/1938	4/25/1939	Wrecked	3/23/1942
Lanzerotto Maloncello	MO	Navigatori	Destroyer	Ansaldo, Sestri Levante	8/30/1927	3/14/1929	1/18/1930	Sunk	3/24/1943
Legionario	LG	Soldati 2a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	10/21/1940	4/16/1941	3/1/1942	Transferred	8/15/1948
Legnano		Ostia	Mine Layer	Cantiere Navale Riuniti (C.N.R.) Ancona	1/1/1925	1/1/1926
Legnano		Ostia	Minelayer	Cantiere Navale Riuniti (C.N.R.) Ancona
Leone	LE	Leone	Destroyer	Ansaldo, Sestri Levante	11/23/1921	10/1/1923	7/1/1923	Wrecked	4/1/1941
Leone Pancaldo	PN	Navigatori	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	7/7/1927	2/5/1929	11/30/1929	Sunk	5/29/1942
Lepanto		Ostia	Minelayer	Cantiere Navale Riuniti (C.N.R.) Ancona
Lepanto		Ostia	Mine Layer	Cantiere Navale Riuniti (C.N.R.) Ancona	1/1/1925	1/1/1925
Libeccio	LI	Maestrale	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	9/29/1931	7/4/1934	11/23/1934	Sunk	11/9/1941
Libellula	C 32	Gabbiano	Corvette	Navalmeccanica, Castellammare	12/3/1942
Libra	LB	Spica tipo Alcione	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	12/7/1936	10/3/1937	1/19/1938
Lince	LC	Spica tipo Alcione	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	12/7/1936	1/15/1938	4/1/1938	Sunk	8/28/1943
Lira	LR	Spica tipo Alcione	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	12/7/1936	9/12/1937	1/1/1938	Scuttled	9/9/1943
Littorio		Littorio	Battleship	Ansaldo, Sestri Levante	10/28/1934	8/22/1937	5/6/1940	Removed from Service	6/1/1948
Console Generale Liuzzi	LZ	Liuzzi	Submarine – Oceanic	Tosi, Taranto	10/1/1938	9/17/1939	11/21/1939	Sunk	6/27/1940
Lubiana (ex Ljubljana)		Sebenico	Destroyer	Yarrow, Glasgow
Luca Tarigo	TA	Navigatori	Destroyer	Ansaldo, Sestri Levante	8/30/1927	12/9/1928	11/16/1929	Sunk	4/16/1941
Lucciola	C 27	Gabbiano	Corvette	Navalmeccanica, Castellammare	6/22/1942	3/21/1943		Scuttled	9/13/1943
Luigi Cadorna		Condottieri tipo Cadorna	Cruiser – Light	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/19/1930	9/30/1931	8/11/1933	Removed from Service	5/1/1951
Luigi di Savoia Duca degli Abruzzi		Condottieri tipo Duca degli Abruzzi	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	12/28/1933	4/21/1936	12/1/1937	Removed from Service	5/1/1961
Lupo	LP (LU)	Spica tipo Alcione	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	12/7/1936	11/7/1937	2/28/1938	Sunk	12/2/1942
Macallè		Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	3/1/1936	10/29/1936	3/1/1937	Sunk	6/15/1940
Maestrale	MA	Maestrale	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	9/25/1931	4/5/1934	9/2/1934	Scuttled	9/9/1943
Maggiolino	C 60	Gabbiano	Corvette	Navalmeccanica, Castellammare
Malachite	MH	Perla	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	8/31/1935	7/15/1936	1/6/1936	Sunk	2/9/1943
Alessandro Malaspina	MA	Marconi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	3/1/1939	2/18/1940	6/20/1940	Sunk	9/10/1941
Maleda (ex Mljet)		Arbe	Minelayer	Kraljevica, Jugoslavia
Mameli	MM	Mameli	Submarine – Medium Range	Tosi, Taranto	8/17/1925	12/9/1926	1/20/1929	Stricken	9/9/1943
Luciano Manara	MR	Bandiera	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/18/1928	10/5/1929	9/9/1930	Stricken	9/10/1943
Daniele Manin	MA	Sauro	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	10/9/1924	1/15/1925	5/1/1927	Sunk	4/3/1941
Marangone	C 52	Gabbiano	Corvette	Ansaldo, Sestri Levante	3/15/1943	9/16/1943	8/16/1944	Captured	9/9/1943
Marcello	ML	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/4/1937	9/20/1937	3/5/1938	Sunk	2/22/1941
Guglielmo Marconi	MN	Marconi	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/19/1938	7/30/1939	2/8/1940	Sunk	10/28/1941
Marea	MA	Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	12/1/1941	12/10/1942	5/7/1943	Removed from Service	9/9/1943
Mario Sonzini		Giuseppe Biglieri	Minesweeper	Schiffbau G.S., Bremerhaven
MAS 1D (ex TC 1)		Thornycroft 55	Motor Torpedo Boat	Thornycroft, Londra
MAS 204		Baglietto 12 ton	Motor Torpedo Boat	Baglietto, Varazze		4/12/1918		Scuttled	4/8/1941
MAS 206		Baglietto 12 ton	Motor Torpedo Boat	Baglietto, Varazze		6/14/1918		Scuttled	4/8/1941
MAS 210		Baglietto 12 ton	Motor Torpedo Boat	Baglietto, Varazze		8/3/1918		Scuttled	4/8/1941
MAS 213		Baglietto 12 ton	Motor Torpedo Boat	Baglietto, Varazze		8/19/1918		Scuttled	4/8/1941
MAS 216		Baglietto 12 ton	Motor Torpedo Boat	Baglietto, Varazze		9/16/1918		Scuttled	4/8/1941
MAS 2D (ex TC 2)		Thornycroft 55	Motor Torpedo Boat	Thornycroft, Londra
MAS 423		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 424		Tipo Velocissimo “500” 1a Serie Sperimentale	Motor Torpedo Boat	Baglietto, Varazze
MAS 426		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 430		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 431		Baglietto 1931	Motor Torpedo Boat	Baglietto, Varazze
MAS 432		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 433		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 434		S.V.A.N velocissimo da 13 tonnellate	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 437		S.V.A.N velocissimo diesel	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 438		Baglietto 1934	Motor Torpedo Boat	Baglietto, Varazze
MAS 439		Baglietto 1934	Motor Torpedo Boat	Baglietto, Varazze
MAS 440		Baglietto 1934	Motor Torpedo Boat	Baglietto, Varazze
MAS 441		Baglietto 1934	Motor Torpedo Boat	Baglietto, Varazze
MAS 451		Tipo Biglietto Velocissimo	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 452		Tipo Biglietto Velocissimo	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 501		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 502		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 503		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 504		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 505		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 507		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 509		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 510		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 512		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 513		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 514		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 515		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 516		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 517		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 518		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 519		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 520		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 521		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 522		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 523		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 524		Tipo Velocissimo “500” 1a Serie	Motor Torpedo Boat	Societa Veneziana Automobili Navali (S.V.A.N.), Venezia
MAS 525		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 526		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 527		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 528		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 529		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 530		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 531		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 532		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 533		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 534		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 535		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 536		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 537		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 538		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 539		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 540		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 541		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 542		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 543		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 544		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 545		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 546		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 547		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 548		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 549		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 550		Tipo Velocissimo “500” 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 551		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	C.N.A., Roma
MAS 552		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 553		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 554		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MAS 555		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 556		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 557		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 558		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 559		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 560		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 561		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 562		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 563		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 564		Tipo Velocissimo “500” 3a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 566		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 567		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 568		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 569		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 570		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Baglietto, Varazze
MAS 571		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 572		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 573		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Picchiotto, Limite d’Arno
MAS 574		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 575		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Celli, Venezia
MAS 576		Tipo Velocissimo “500” 4a Serie	Motor Torpedo Boat	Celli, Venezia
Medusa	MU	Argonauta	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/30/1929	12/10/1931	10/8/1932	Sunk	1/30/1942
Melpomene	C 68	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/25/1943	8/29/1943		Captured	9/9/1943
Ciro Menotti	ME	Bandiera	Submarine – Medium Range	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	5/12/1928	7/29/1929	7/29/1930	Stricken	9/9/1943
Meteo		Abastro	Minesweeper	Neptun, Rostok
Micca	MC	Micca	Submarine – Minelaying	Tosi, Taranto	10/15/1931	3/31/1935	1/10/1935	Sunk	7/29/1943
Milazzo		Ostia	Minelayer	Stabilimento Tecnico Triestino, Trieste
Milazzo		Ostia	Mine Layer	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/1/1925	1/1/1927
Millelire	MI	Balilla	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	10/20/1925	9/19/1927	8/11/1928	Removed from Service	5/15/1941
Ammiraglio Millo	MG	Ammiragli	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/16/1939	8/31/1940	7/15/1941	Sunk	5/13/1943
Minerva	C 42	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	4/2/1942	11/5/1942	2/24/1943
Mitragliere	MT	Soldati 2a Serie	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	10/7/1940	9/28/1941	2/1/1942	Transferred	7/15/1948
Mocenigo	MO	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/19/1937	11/20/1937	8/16/1938	Sunk	3/14/1941
Monsone	MS	Orsa 2a Serie	Torpedo Boat	Navalmeccanica, Castellammare	6/18/1941	6/7/1942	11/28/1942	Sunk	3/1/1943
Morosini	MS	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/2/1937	7/28/1938	11/11/1938	Sunk	8/11/1942
Antonio Mosto		Rosolino Pilo	Destroyer	Pattison, Napoli
Mozambano		Curtatone	Destroyer	Orlando, Livorno	1/1/1920	1/1/1922	1/1/1923
MS 11		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 41 (ex Orjen)		S1	Motor Torpedo Boat	Lurssen, Vegesak
MS 51		MS 51	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	8/6/1942	10/14/1942	2/15/1943	Scuttled	9/9/1943
MS 12		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 13		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 14		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 15		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 16		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 21		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 22		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 23		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 24		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 25		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 26		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 31		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 32		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 33		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 34		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 35		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 36		C.R.D.A. 60 ton 1a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 42 (ex Velebit)		Lürssen “S 2”	Motor Torpedo Boat	Lurssen, Vegesak
MS 43 (ex Dinara)		Lürssen “S 2”	Motor Torpedo Boat	Lurssen, Vegesak
MS 44 (ex Triglav)		Lürssen “S 2”	Motor Torpedo Boat	Lurssen, Vegesak
MS 45 (ex Suborov)		Lürssen “S 2”	Motor Torpedo Boat	Lurssen, Vegesak
MS 46 (ex Rudnik)		Lürssen “S 2”	Motor Torpedo Boat	Lurssen, Vegesak
MS 51		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 52		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 53		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 54		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 55		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 56		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 61		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 62		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 63		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 64		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 65		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 66		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 71		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 72		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 73		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 74		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 75		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
MS 76		C.R.D.A. 60 ton 2a Serie	Motor Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
Murena		Tritone	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	4/1/1942	4/11/1943	8/25/1943	Scuttled	9/9/1943
Muzio Attendolo		Condottieri tipo Montecuccoli	Cruiser – Light	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	4/10/1933	9/9/1934	8/7/1935	Sunk	12/4/1942
Naiade	NA	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/9/1931	3/27/1933	11/16/1933	Scuttled	12/14/1940
Nani	NI	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/15/1937	1/16/1938	9/5/1938	Sunk	1/7/1941
Narvalo	NR	Squalo	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/17/1928	3/15/1930	12/11/1930	Scuttled	1/14/1943
Nautilo		Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/3/1942	3/20/1943	7/26/1943	Scuttled	9/9/1943
Neghelli	NG	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	2/25/1937	11/7/1937	2/22/1938	Sunk	1/19/1941
Nembo	NB	Turbine	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	1/21/1925	1/27/1927	10/24/1927	Sunk	7/20/1940
Nereide	NE	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/30/1931	5/25/1933	2/17/1934	Sunk	7/13/1943
Nichelio	NC	Platino	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	7/1/1941	4/12/1942	7/30/1942	Removed from Service	9/8/1943
Ondina	ON	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	7/25/1931	12/2/1933	9/19/1934	Scuttled	7/11/1942
Onice	OC	Perla	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	8/27/1935	6/15/1936	9/1/1936	Stricken	9/9/1943
Orione		Orsa 1a Serie	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	4/27/1936	4/21/1937	3/31/1938
Orsa		Orsa 1a Serie	Torpedo Boat	Cantiere Navale Riuniti (C.N.R.) Ancona	4/27/1936	3/21/1937	3/31/1938
Ostia		Ostia	Mine Layer	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/1/1925	1/1/1925
Ostia		Ostia	Minelayer	Stabilimento Tecnico Triestino, Trieste
Ostro	OT	Turbine	Destroyer	Ansaldo, Sestri Levante	4/29/1925	1/2/1928	10/9/1928	Sunk	7/21/1940
Otaria	OA	Glauco	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/17/1933	3/20/1935	10/20/1935	Stricken	9/9/1943
Palestro		Palestro	Destroyer	Orlando, Livorno
Pallade	PD	Spica tipo Alcione	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	2/13/1937	12/19/1937	10/5/1938	Sunk	8/4/1943
Pantera	PA	Leone	Destroyer	Ansaldo, Sestri Levante	12/19/1921	10/18/1923	10/28/1924	Scuttled	4/4/1941
Partenope	PN	Spica tipo Alcione	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	1/31/1937	2/27/1938	11/26/1938	Sunk	5/4/1943
Pasman (ex Mosor)		Arbe	Minelayer	Kraljevica, Jugoslavia
Pegaso		Orsa 1a Serie	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	2/15/1936	12/8/1936	3/30/1938	Scuttled	9/11/1943
Pelagosa		Fasana	Minelayer	Navalmeccanica, Castellammare
Pellegrino Matteucci		Pellegrino Matteucci	Minesweeper	Deutsche Werft, Amburgo (Germany)
Pellegrino Matteucci		Giuseppe Biglieri	Minesweeper	Schiffbau G.S., Bremerhaven
Pellicano	C 14	Gabbiano	Corvette	Societa Anonima Cantieri Cerusa, Genova-Voltri	1/14/1942	2/12/1943	3/15/1943
Perla	PL	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	8/31/1935	5/3/1936	7/8/1936	Captured	7/9/1942
Persefone	C 40	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/9/1942	9/21/1942	11/28/1942	Scuttled	9/9/1943
Perseo	PS	Spica tipo Perseo	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	11/21/1934	10/9/1935	2/1/1936	Sunk	5/4/1943
Emanuele Pessagno	PS	Navigatori	Destroyer	Cantiere Navale Riuniti (C.N.R.) Ancona	10/9/1927	8/12/1929	3/10/1930	Sunk	5/29/1942
Antonio Pigafetta	PI	Navigatori	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	12/29/1927	11/10/1929	5/1/1931	Captured	10/1/1944
Vettor Pisani	PN	Pisani	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	12/3/1925	11/24/1927	6/16/1929	Removed from Service	9/9/1943
Platino	PT	Platino	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	11/20/1940	6/1/1941	10/2/1941	Removed from Service
Pleiadi	PL	Spica tipo Alcione	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	1/4/1937	9/5/1937	7/4/1938	Sunk	10/14/1941
Pola		Zara	Cruiser – Heavy	Odero-Terni-Orlandi (O.T.O.), Livorno	3/17/1931	12/5/1931	12/21/1932	Sunk	3/28/1941
Polluce	PV	Spica tipo Alcione	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	2/13/1937	10/24/1937	8/8/1938	Sunk	9/4/1942
Pomona	C 45	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/16/1942	11/18/1942	4/4/1943
Pompeo Magno		Capitani Romani	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Livorno	9/23/1939	8/24/1941	6/4/1943	Removed from Service	5/1/1950
Porfido	PO	Platino	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/9/1940	8/23/1941	1/24/1942	Sunk	12/6/1942
Premuda (ex Dubvronik)		Premuda	Destroyer	Yarrow, Glasgow
Procellaria	C 12	Gabbiano	Corvette	Societa Anonima Cantieri Cerusa, Genova-Voltri	1/14/1942	9/4/1942	11/29/1942
Procione		Orsa 1a Serie	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	2/15/1936	1/31/1937	3/30/1938	Scuttled	9/9/1943
Provana	PR	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/3/1937	3/16/1938	7/25/1938	Sunk	6/17/1940
Pugnale		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/9/1943	8/1/1943	7/7/1944	Captured	9/9/1943
Quintino Sella	SE	Sella	Destroyer	Pattison, Napoli	10/12/1922	4/25/1925	3/25/1926	Sunk	9/11/1943
R.D.12		R.D.	Minesweeper	Tosi, Taranto
R.D.13		R.D.	Minesweeper	Poli, Chioggia
R.D.16		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.17		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.18		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.20		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.21		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.22		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.23		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.24		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.25		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.26		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.27		R.D.	Minesweeper	Tosi, Taranto
R.D.28		R.D.	Minesweeper	Tosi, Taranto
R.D.29		R.D.	Minesweeper	Tosi, Taranto
R.D.30		R.D.	Minesweeper	Tosi, Taranto
R.D.31		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.32		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.33		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.34		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.35		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.36		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.37		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.38		R.D.	Minesweeper	Arsenale Navale, Napoli
R.D.39		R.D.	Minesweeper	Tosi, Taranto
R.D.40		R.D.	Minesweeper	Tosi, Taranto
R.D.41		R.D.	Minesweeper	Tosi, Taranto
R.D.42		R.D.	Minesweeper	Tosi, Taranto
R.D.43		R.D.	Minesweeper	Tosi, Taranto
R.D.44		R.D.	Minesweeper	Tosi, Taranto
R.D.55		R.D.	Minesweeper	Migliardi, Savona
R.D.56		R.D.	Minesweeper	Migliardi, Savona
R.D.57		R.D.	Minesweeper	Migliardi, Savona
R.D.58		R.D.58	Minesweeper	Danubius, Fiume
R.D.59		R.D.58	Minesweeper	Danubius, Fiume
R.D.6		R.D.	Minesweeper	Navalmeccanica, Castellammare
R.D.60		R.D.58	Minesweeper	Danubius, Fiume
R.D.7		R.D.	Minesweeper	Tosi, Taranto
R10		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	2/24/1943	7/13/1943		Stricken
R11		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/10/1943	7/6/1944		Stricken
R12		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/13/1943	9/29/1944		Stricken
R3		R	Submarine – Transport	Tosi, Taranto	3/1/1943	9/7/1946		Stricken
R4		R	Submarine – Transport	Tosi, Taranto	3/1/1943	9/30/1946		Stricken
R5		R	Submarine – Transport	Tosi, Taranto	3/25/1943			Stricken
R6		R	Submarine – Transport	Tosi, Taranto	3/25/1943			Stricken
R7		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/1/1943	10/31/1943		Stricken
R8		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/1/1943	12/28/1943		Stricken
R9		R	Submarine – Transport	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	3/6/1943	2/27/1944		Stricken
Raimondo Montecuccoli		Condottieri tipo Montecuccoli	Cruiser – Light	Ansaldo, Sestri Levante	10/1/1931	8/2/1934	6/30/1935		6/1/1964
Attilio Regolo		Capitani Romani	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Livorno	9/28/1939	8/28/1940	5/14/1942	Removed from Service	7/26/1948
Remo	RE	R	Submarine – Transport	Tosi, Taranto	7/21/1942	3/21/1943	6/19/1943	Sunk	7/15/1943
Renna	C 24	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	5/31/1942	12/5/1942		Captured	9/9/1943
Bettino Ricasoli	RC	Sella	Destroyer	Pattison, Napoli	1/11/1923	1/29/1926	12/11/2026	Transferred	3/1/1940
Rigel		Ariete	Torpedo Boat	Ansaldo, Sestri Levante	7/15/1942	5/22/1943	1/23/1944	Captured	9/9/1943
Francesco Rismondo (ex Osvetnik)	RI	Osvetnik	Submarine – Coastal	Loires, Nantes (France)		1/14/1929	4/1/1941	Scuttled	8/9/1943
Roma		Littorio	Battleship	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/18/1938	6/9/1940	6/14/1942	Sunk	9/9/1943
Romolo	RO	R	Submarine – Transport	Tosi, Taranto	4/5/1942	3/28/1943	6/19/1943	Sunk	7/18/1943
Rosolino Pilo		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	1/1/1913	1/1/1915	1/1/1915
Rubino	RU	Sirena	Submarine – Coastal	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	9/26/1931	3/29/1933	3/21/1934	Sunk	6/29/1940
S 1 (ex U 428 )		S	Submarine – Coastal	Danziger Werft Danzig (Germany)	8/14/1942	3/11/1943	6/26/1943	Captured
S 2 (ex U 746)		S	Submarine – Coastal	Schichau, Danzig (Germany)	7/15/1942		7/4/1943	Captured
S 3 (ex U747)		S	Submarine – Coastal	Schichau, Danzig (Germany)	8/19/1942		7/17/1943	Captured
S 4 (ex U 429)		S	Submarine – Coastal	Danziger Werft Danzig (Germany)	9/14/1942		7/14/1943	Captured
S 5 (ex (U 748)		S	Submarine – Coastal	Schichau, Danzig (Germany)	8/20/1942		7/31/1943	Captured
S 6 (ex U430)		S	Submarine – Coastal	Danziger Werft Danzig (Germany)	10/5/1942	4/22/1943	8/4/1943	Captured
S 7 (ex U749)		S	Submarine – Coastal	Schichau, Danzig (Germany)	9/28/1942	3/30/1943	8/14/1943	Captured
S 8 (ex U1161)		S	Submarine – Coastal	Danziger Werft Danzig (Germany)	10/27/1942		8/25/1943	Captured
S 9 (ex U 750)		S	Submarine – Coastal	Schichau, Danzig (Germany)	9/29/1942		8/26/1943	Captured
Saetta	SA	Dardo 1a Serie	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	5/27/1927	1/17/1932	5/10/1932	Sunk	2/3/1943
Sagittario	SG	Spica tipo Perseo	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	11/14/1935	6/21/1936	10/8/1936
Ammiraglio Saint Bon	SB	Ammiragli	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/16/1939	6/6/1940	3/12/1941	Sunk	1/5/1942
Salpa	SA	Argonauta	Submarine – Coastal	Tosi, Taranto	4/23/1930	5/8/1932	12/12/1932	Sunk	6/27/1941
San Giorgio		San Giorgio	Obsolete Ship	Navalmeccanica, Castellammare	7/4/1907	7/27/1908	7/1/1910	Scuttled
San Marco		San Giorgio	Obsolete Ship	Navalmeccanica, Castellammare				Captured	9/9/1943
San Martino		Palestro	Destroyer	Orlando, Livorno
Santorre Santarosa	SN	Bandiera	Submarine – Medium Range	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	5/1/1928	10/22/1929	7/29/1930	Scuttled	1/20/1943
Nazario Sauro	SU	Sauro	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	2/9/1924	5/12/1926	9/23/1926	Sunk	4/3/1941
Simone Schiaffino		Rosolino Pilo	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Antonio Sciesa	SC	Balilla	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	10/20/1925	8/18/1928	4/12/1929	Scuttled	11/6/1942
Scimitarra	C 33	Gabbiano	Corvette	Breda, Venezia	2/24/1942	9/16/1942	5/15/1943
Scipione Africano		Capitani Romani	Cruiser – Light	Odero-Terni-Orlandi (O.T.O.), Livorno	9/28/1939	1/12/1941	4/23/1943	Removed from Service	8/9/1948
Scirè	SR	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/30/1937	1/6/1938	4/25/1938	Sunk	8/10/1942
Scirocco	SC	Maestrale	Destroyer	Cantieri del Tirreno (C.T.), Genova-Riva Trigoso	9/29/1931	4/22/1934	10/21/1934	Wrecked	3/23/1942
Scure	C 62	Gabbiano	Corvette	Breda, Venezia	10/20/1943
Sebenico (ex Beograd)		Sebenico	Destroyer	Loires, Nantes (France)
Serpente	AU	Argonauta	Submarine – Coastal	Tosi, Taranto	4/23/1930	2/28/1932	11/12/1932	Scuttled	9/12/1943
Settembrini	ST	Settembrini	Submarine – Medium Range	Tosi, Taranto	4/16/1928	7/28/1930	1/25/1932	Sunk	9/9/1943
Ruggiero Settimo	SO	Settembrini	Submarine – Medium Range	Tosi, Taranto	4/16/1928	3/29/1931	4/25/1932	Removed from Service	9/9/1943
Sfinge	C 47	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/20/1942	9/1/1943	5/12/1943
Sibilla	C 49	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/20/1942	3/10/1943	6/5/1943
Sirena	SI	Sirena	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/1/1931	1/26/1933	10/2/1933	Scuttled	9/9/1943
Sirio	SI	Spica tipo Perseo	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	11/12/1934	11/16/1935	3/1/1936
Smeraldo	SM	Sirena	Submarine – Coastal	Tosi, Taranto	5/25/1931	7/23/1933	11/29/1933	Sunk	9/15/1941
Solferino		Palestro	Destroyer	Orlando, Livorno
Solta (ex Meljine)		Arbe	Minelayer	Kraljevica, Jugoslavia
Spada		Ariete	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/9/1943	7/1/1943	2/12/1944	Captured	9/9/1943
Sparide		Tritone	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	4/25/1942	2/21/1943	8/7/1943	Scuttled	9/9/1943
Speri	SP	Mameli	Submarine – Medium Range	Tosi, Taranto	9/28/2025	5/25/1928	8/20/1929	Stricken	2/1/1942
Spica	SP	Spica	Torpedo Boat	Societa Anonima Bacini e Scali Napoli, Napoli	1/14/1942	1/30/1944	9/8/1944	Captured	9/9/1943
Spica		Ariete	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	1/14/1942	1/30/1944	9/8/1944	Captured	9/9/1943
Spigola		Tritone	Submarine – Coastal	Tosi, Taranto	6/10/1943			Stricken
Spingarda	C 36	Gabbiano	Corvette	Breda, Venezia	3/14/1942	3/22/1943		Captured	9/11/1943
Squadrista (later Corsaro)	SQ	Soldati 2a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	9/4/1941	9/12/1941		Captured	9/9/1943
Squalo	SQ	Squalo	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/10/1928	1/15/1930	10/6/1930	Removed from Service	9/9/1943
Stambecco	C 57	Gabbiano	Corvette	Odero-Terni-Orlandi (O.T.O.), Livorno	3/4/1943
Stella Polare		Ariete	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	4/1/1942	7/11/1943	1/15/1944	Captured	9/9/1943
Strale	ST	Dardo 1a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	2/20/1929	3/26/1931	2/6/1932	Wrecked	6/21/1942
Strolaga	C 53	Gabbiano	Corvette	Ansaldo, Sestri Levante	3/15/1943			Captured	9/9/1943
Capitano Tarantini	TA	Liuzzi	Submarine – Oceanic	Tosi, Taranto	4/5/1939	1/7/1940	3/16/1930	Sunk	12/15/1940
Taranto (ex Strassburg)		Taranto	Obsolete Ship	Wilhelmshaven, (Germany)		8/24/1911	10/9/1912	Scuttled	9/9/1943
Enrico Tazzoli	TZ	Calvi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	9/16/1932	10/13/1935	4/18/1936	Sunk	5/18/1943
Tembien	TE	Adua	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	2/6/1937	2/6/1938	7/1/1938	Sunk	8/2/1941
Tersicore	C 69	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	4/15/1943
Tifone	TF	Orsa 2a Serie	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/17/1941	3/31/1942	7/11/1942	Captured	5/7/1943
Tigre	TI	Leone	Destroyer	Ansaldo, Sestri Levante	1/23/1922	8/7/1924	10/10/1924	Scuttled	4/4/1941
Topazio	TP	Sirena	Submarine – Coastal	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	9/26/1931	5/15/1933	4/1/1934	Sunk	9/12/1943
Luigi Torelli		Marconi	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	2/15/1939	1/6/1940	5/15/1940	Captured	9/8/1943
Torricelli	TL	Brin	Submarine – Oceanic	Tosi, Taranto	12/23/1937	3/26/1939	5/7/1939	Sunk	6/23/1940
Toti	TO	Balilla	Submarine – Oceanic	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	1/26/2025	2/20/1927	9/20/1928	Stricken	4/2/1943
Trento		Trento	Cruiser – Heavy	Odero-Terni-Orlandi (O.T.O.), Livorno	2/8/1925	10/4/1927	4/3/1929	Sunk	6/15/1942
Tricheco	TR	Squalo	Submarine – Medium Range	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	11/10/1928	9/11/1930	6/23/1931	Sunk	3/18/1942
Trieste		Trento	Cruiser – Heavy	Stabilimento Tecnico Triestino, Trieste	6/22/1925	10/24/1926	12/21/1928	Sunk	4/10/1943
Triglia		Triglia	Minesweeper	Deutsche Werft, Amburgo (Germany)
Tritone	TN	Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	5/15/1941	1/3/1942	10/10/1942	Sunk	1/19/1943
Tuffetto	C 51	Gabbiano	Corvette	Ansaldo, Sestri Levante	3/15/1943	8/25/1943	3/3/1944	Captured	9/9/1943
Turbine	TB	Turbine	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	3/24/1925	4/21/1927	8/27/1927	Scuttled	9/9/1943
Turchese	TC	Perla	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	9/27/1935	7/19/1936	9/21/1936	Stricken	9/9/1943
Stefano Turr		Stefano Turr	Motor Torpedo Boat	C.M.A., Marina Pisa
Uarsciek	UR	Adua	Submarine – Coastal	Tosi, Taranto	12/2/1936	9/19/1937	12/4/1937	Sunk	12/15/1942
Uebi Scebeli	US	Adua	Submarine – Coastal	Tosi, Taranto	1/12/1937	10/3/1937	12/21/1937	Sunk	6/29/1940
Ugliano (ex Marjan)		Arbe	Minelayer	Kraljevica, Jugoslavia
Ugolino Vivaldi	VI	Navigatori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	5/16/1927	1/9/1929	3/6/1930	Sunk	7/10/1943
Uragano	UR	Orsa 2a Serie	Torpedo Boat	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	6/14/1941	5/3/1942	9/26/1942	Sunk	2/3/1943
Urania	C 65	Gabbiano	Corvette	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/1/1942	4/21/1943	8/1/1943
Antoniotto Usodimare	US	Navigatori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente	6/1/1927	5/12/1929	11/21/1929	Sunk	6/8/1942
VAS 201		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 202		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 203		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 204		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 205		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 206		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 207		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 208		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 209		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 210		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 211		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 212		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 213		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 214		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Picchiotto, Limite d’Arno
VAS 215		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 216		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 217		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 218		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 219		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 220		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 221		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 222		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 223		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 224		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 225		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 226		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 227		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 228		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 229		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 230		Baglietto 68 ton 1a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 231		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 232		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 233		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 234		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 235		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 236		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Baglietto, Varazze
VAS 237		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Costaguta, Genova-Voltri
VAS 238		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Costaguta, Genova-Voltri
VAS 239		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 240		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 241		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 242		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Navalmeccanica, Castellammare
VAS 243		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 244		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 245		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Soriente, Salerno
VAS 246		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 247		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 248		Baglietto 68 ton 2a serie	Anti Submarine Patrol Vessel	Celli, Venezia
VAS 301		VAS 301	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 302		VAS 301	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 303		VAS 301	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 304		VAS 301	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 305		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 306		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 307		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 308		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 309		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 310		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 311		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
VAS 312		VAS 305	Anti Submarine Patrol Vessel	Ansaldo, Cerusa Voltri
Vedetta		Vedetta	Minesweeper	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
Vega	VG	Spica tipo Perseo	Torpedo Boat	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	11/14/1935	6/21/1936	10/12/1936	Sunk	1/10/1941
Velella	VL	Argo	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	12/9/1935	12/18/1936	8/31/1937	Sunk	9/7/1943
Velite	VL	Soldati 2a Serie	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	4/19/1941	8/31/1941	8/31/1942	Transferred	7/24/1948
Veniero	VN	Marcello	Submarine – Oceanic	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/23/1937	2/14/1938	6/5/1938	Sunk	6/7/1942
Vespa	C 26	Gabbiano	Corvette	Navalmeccanica, Castellammare	5/4/1942	11/22/1942	9/2/1943	Captured	9/11/1943
Vesuvio		Etna	Cruiser – Light	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	8/26/1939	8/6/1941
Vigilante		Vedetta	Minesweeper	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone
Vincenzo G. Orsini		Sirtori	Destroyer	Odero-Terni-Orlandi (O.T.O.), Genova-Sestri Ponente
Vincenzo Gioberti	GB	Oriani	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	1/2/1936	7/19/1936	10/27/1937	Sunk	8/9/1943
Vittorio Alfieri	AL	Oriani	Destroyer	Odero-Terni-Orlandi (O.T.O.), Livorno	4/4/1936	12/20/1936	12/1/1937	Sunk	4/28/1941
Vittorio Veneto		Littorio	Battleship	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	10/28/1934	7/25/1937	4/28/1940	Removed from Service	2/1/1948
Volframio	VO	Platino	Submarine – Coastal	Tosi, Taranto	12/16/1940	11/9/1941	2/15/1942	Scuttled	9/9/1943
Vortice	VR	Tritone	Submarine – Coastal	Cantieri Riuniti dell’Adriatico (C.R.D.A.), Monfalcone	1/3/1942	2/23/1943	6/21/1943	Removed from Service	9/9/1943
Zaffiro	ZA	Sirena	Submarine – Coastal	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	9/16/1931	6/28/1933	6/4/1934	Sunk	6/9/1942
Zagaglia	C 64	Gabbiano	Corvette	Breda, Venezia	2/1/1944
Zara		Zara	Cruiser – Heavy	Odero-Terni-Orlandi (O.T.O.), Muggiano (La Spezia)	7/4/1929	4/27/1930	10/20/1931	Sunk	3/28/1941
Zeffiro	ZF	Turbine	Destroyer	Ansaldo, Sestri Levante	4/29/1924	5/27/1927	5/25/1928	Sunk	7/5/1940
Nicolò Zeno	ZE	Navigatori	Destroyer	Cantieri Navali del Quarnaro (C.N.Q.), Fiume	6/5/1927	8/12/1928	5/27/1930	Sunk	9/9/1943
Zoea	ZE	Foca	Submarine – Medium Range	Tosi, Taranto	3/3/1936	12/5/1937	2/12/1938	Stricken	9/9/1943