The Regia Marina (RM) or Royal Italian Navy was the navy of the Kingdom of Italy from 1861 to 1946. In 1946, with the birth of the Italian Republic, the Regia Marina changed its name to Marina Militare.
Galileo Galilei was one of four Archimede-class submarines built for the Regia Marina during the early 1930s. She was named after Galileo Galilei, an Italian astronomer and engineer.
Motoscafo armato silurante, alternatively Motoscafo antisommergibili and commonly abbreviated as MAS, was a class of fast torpedo-armed vessels used by the Regia Marina during World War I and World War II. Originally, "MAS" referred to motobarca armata SVAN, Società Veneziana Automobili Navali.
The Glauco class was a pair of submarines ordered by the Portuguese government, but were taken over and completed for the Regia Marina during the 1930s. They played a minor role in the Spanish Civil War of 1936–1939 supporting the Spanish Nationalists.
SMS Friedrich Carl was a German armored cruiser built in the early 1900s for the German Kaiserliche Marine. She was the second and final member of the Prinz Adalbert class, which was built to provide scouts for the German fleet and station ships in Germany's colonial empire. Friedrich Carl was built by the Blohm & Voss shipyard in Hamburg. She was laid down in August 1901, launched in June 1902, and commissioned in December 1903. She was armed with a main battery of four 21 cm (8.3 in) guns and could reach a top speed of 20 knots.
The Perla-class submarines were the third sub-class of the 600 Series of coastal submarines built for the Royal Italian Navy during the 1930s and named after gemstones. Of the ten boats built of this class, only three survived World War II.
BETASOM was a submarine base established at Bordeaux, France by the Regia Marina Italiana during World War II. From this base, Italian submarines participated in the Battle of the Atlantic from 1940 to 1943 as part of the Axis anti-shipping campaign against the Allies.
The CB class was a group of midget submarines built for the Italian Navy during World War II. However, they were also used by several other navies, seeing action in the Mediterranean and in the Black Sea.
Sardegna was the third of three Re Umberto-class ironclad battleships built for the Italian Regia Marina. The ship, named for the island of Sardinia, was laid down in La Spezia in October 1885, launched in September 1890, and completed in February 1895. She was armed with a main battery of four 340 mm (13.5 in) guns and had a top speed of 20.3 knots —albeit at the cost of armor protection—and she was one of the first warships to be equipped with a wireless telegraph.
The Emanuele Filiberto was a pre-dreadnought battleship built for the Italian Navy during the 1890s. Her keel was laid down in October 1893 and she was launched in September 1897; work was completed in April 1902. She had one sister ship, Ammiraglio di Saint Bon, the lead ship of the Ammiraglio di Saint Bon class. She was armed with a main battery of four 254 mm (10 in) guns and was capable of a speed in excess of 18 knots.
Italia was an Italian ironclad battleship built for the Italian Regia Marina, the lead ship of the Italia class. She and her single sister ship, Lepanto, had lengthy construction times. Italia was laid down in January 1876, launched in September 1880, and completed in October 1885. She was armed with a main battery of four 432 mm (17 in) guns mounted in a central barbette and was capable of a top speed of 17.8 knots. Unusually for ships of that era, Italia had an armored deck rather than the typical belt armor.
The Italian cruiser San Giorgio was the name ship of her class of two armored cruisers built for the Royal Italian Navy in the first decade of the 20th century. Commissioned in 1910, the ship was badly damaged when she ran aground before the start of the Italo-Turkish War in 1911, although she was repaired before its end. During World War I, San Giorgio's activities were limited by the threat of Austro-Hungarian submarines, although the ship did participate in the bombardment of Durazzo, Albania, in late 1918.
The Liuzzi class was a class of four submarines built by Tosi in Taranto for the Royal Italian Navy. The submarines were built in 1939 and began their Second World War service in the Mediterranean Sea, where Liuzzi was sunk. The three surviving boats were transferred to the BETASOM Atlantic submarine base at Bordeaux in 1940. After Tarantini was sunk, Bagnolini and Giuliani were selected for conversion to "transport submarines" in order to exchange rare or irreplaceable trade goods with Japan. Cargo capacity of 160 tons reduced reserve buoyancy from between 20 and 25% to between 3.5 and 6%; and armament was reduced to defensive machine guns. The submarines saw action in the Second World War during which they collectively sunk 5 freighters and 1 light cruiser and were eventually either sunk or captured.
The Italian cruiser San Marco was a San Giorgio-class armoured cruiser built for the Royal Italian Navy in the first decade of the 20th century. She was the first large Italian ship fitted with steam turbines and the first turbine-powered ship in any navy to have four propeller shafts. The ship participated in the Italo-Turkish War of 1911–1912, during which time she supported the occupations of Benghazi and Derna, the island of Rhodes, and bombarded the fortifications defending the entrance to the Dardanelles. During World War I, San Marco's activities were limited by the threat of Austro-Hungarian submarines, although the ship did participate in the bombardment of Durazzo, Albania in late 1918. She played a minor role in the Corfu incident in 1923 and was converted into a target ship in the first half of the 1930s. San Marco was captured by the Germans when they occupied northern Italy in 1943 and was found sunk at the end of the war. The ship was broken up and scrapped in 1949.
The Italian cruiser Pisa was the name ship of her class of two armored cruisers built for the Royal Italian Navy in the first decade of the 20th century. The ship participated in the Italo-Turkish War of 1911–1912, during which she supported the occupations of Tobruk, Libya and several islands in the Dodecanese and bombarded the fortifications defending the entrance to the Dardanelles. During World War I, Pisa's activities were limited by the threat of Austro-Hungarian submarines, although the ship did participate in the bombardment of Durazzo, Albania in late 1918. After the war she became a training ship and was stricken from the Navy List in 1937 before being scrapped.
Partenope was a torpedo cruiser built for the Italian Regia Marina in the 1880s, the lead ship of her class, which included seven other vessels. The ship was built by the Regio Cantiere di Castellammare di Stabia; she was laid down in June 1888, was launched in December 1889, and was completed in September 1890. Her main armament were her five torpedo tubes, which were supported by a battery of ten small-caliber guns.
Goito was a torpedo cruiser built for the Italian Regia Marina in the 1880s. She was the lead ship of the Goito class, which included three other vessels. Goito was built by the Regio Cantiere di Castellammare di Stabia shipyard between September 1885 and February 1888. She was armed with a variety of light guns and five 14-inch (356 mm) torpedo tubes, and was capable of a top speed of 18 knots. The ship served the duration of her career in the main Italian fleet. Her early service was primarily occupied with training exercises; front-line duties ended in 1897 when she was converted into a minelayer, though she continued to participate in fleet exercises. During World War I, Goito laid defensive minefields in the Adriatic Sea. She was eventually sold for scrap in 1920 and broken up.
Otaria was the name of at least two ships of the Italian Navy and may refer to:
Narvalo was one of five Glauco-class submarines built for the Regia Marina during the early 1900s. The boat served in World War I with defensive purposes and was demolished in 1918.
Glauco was one of five Glauco-class submarines built for the Regia Marina during the early 1900s. The boat served in World War I and ceased service in 1916.
Italy 
