Human torpedoes or manned torpedoes are a type of diver propulsion vehicle on which the diver rides, generally in a seated position behind a fairing. They were used as secret naval weapons in World War II. The basic concept is still in use.
The Tegetthoff class was a class of four dreadnought battleships built for the Austro-Hungarian Navy. Named for Austrian Admiral Wilhelm von Tegetthoff, the class was composed of SMS Viribus Unitis, SMS Tegetthoff, SMS Prinz Eugen, and SMS Szent István. Construction started on the ships shortly before World War I; Viribus Unitis and Tegetthoff were both laid down in 1910, Prinz Eugen and Szent István followed in 1912. Three of the four warships were built in the Stabilimento Tecnico Triestino shipyard in Trieste; Szent István was built in the Ganz-Danubius shipyard in Fiume, so that both parts of the Dual Monarchy would participate in the construction of the ships. The Tegetthoff-class ships hold the distinction for being the first and only dreadnought battleships of the Austro-Hungarian Navy. The SMS Szent István had a different more modern propulsion system than her sister ships.
Janko Vuković, sometimes spelt Janko Vukovich or von Vukovich, also known as Janko Vuković de Podkapelski or Janko Vuković-Podkapelski was a Croatian naval officer who served in the Austro-Hungarian Navy and - amidst its collapse - for a brief period as commander of the fleet of the fledgling State of Slovenes, Croats and Serbs. Vuković saw action in World War I and was appointed commander of the fleet in October 1918 as the Austria-Hungary disintegrated and the entire navy was handed over to the fledgling State of Slovenes, Croats and Serbs. He died on board the SMS Viribus Unitis, sunk by Italian commandos.
SMS Szent István was the last of four Tegetthoff-class dreadnought battleships built for the Austro-Hungarian Navy. Szent István was the only ship of her class to be built within the Hungarian part of the Austro-Hungarian Empire, a concession made to the Hungarian government in return for its support for the 1910 and 1911 naval budgets which funded the Tegetthoff class. She was built at the Ganz-Danubius shipyard in Fiume, where she was laid down in January 1912. She was launched two years later in 1914, but Szent István's construction was delayed due to the smaller shipyards in Fiume, and further delayed by the outbreak of World War I in July 1914. She was finally commissioned into the Austro-Hungarian Navy in December 1915.
The Austro-Hungarian Navy or Imperial and Royal War Navy was the naval force of Austria-Hungary. Ships of the Austro-Hungarian Navy were designated SMS, for Seiner Majestät Schiff. The k.u.k. Kriegsmarine came into being after the formation of Austria-Hungary in 1867, and ceased to exist in 1918 upon the Empire's defeat and subsequent collapse at the end of World War I.
The Decima Flottiglia MAS was an Italian flotilla, with marines and commando frogman unit, of the Regia Marina. The acronym MAS also refers to various light torpedo boats used by the Regia Marina during World War I and World War II.
SMS Viribus Unitis was an Austro-Hungarian dreadnought battleship, the first of the Tegetthoff class. "Viribus Unitis", meaning "With United Forces", was the personal motto of Emperor Franz Joseph I.
SMS Prinz Eugen was the third of four Tegetthoff-class dreadnought battleships built for the Austro-Hungarian Navy. Prinz Eugen was named for Prince Eugene of Savoy, a Habsburg general and statesman during the 17th and 18th centuries most notable for defeating the Ottoman Empire at the Battle of Zenta in 1697. The ship was armed with a main battery of twelve 30.5 cm (12.0 in) guns in four triple turrets. Constructed shortly before World War I, she was built at the Stabilimento Tecnico Triestino shipyard in Trieste, where she was laid down in January 1912 and launched in November that same year.
Naval warfare in the Mediterranean during World War I took place between the naval forces of the Entente and the Central Powers in the Mediterranean Sea between 1914 and 1918.
Luigi Rizzo, 1st Count of Grado and Premuda (1887–1951), nicknamed the Sinker, was an Italian admiral. He is mostly known for his distinguished service in World War I; as a torpedo boat commander having sunk no fewer than two Austro-Hungarian battleships.
The Adriatic Campaign of World War I was a naval campaign fought between the Central Powers and the Mediterranean squadrons of Great Britain, France, the Kingdom of Italy, Australia, and the United States.
The U-1 class was a class of two submarines or U-boats built for and operated by the Austro-Hungarian Navy. The class comprised U-1 and U-2. The boats were built to an American design at the Pola Navy Yard after domestic design proposals failed to impress the Navy. Constructed between 1907 and 1909, the class was a part of the Austro-Hungarian Navy's efforts to competitively evaluate three foreign submarine designs.
The history of the Croatian Navy can be traced from the Middle Ages until modern times. See List of admirals of Croatia
Raffaele Rossetti was an Italian engineer and military naval officer who sank the once main battleship of the Austro-Hungarian Empire at the end of World War I. He was also a politician of the Italian Republican Party.
Franz Pitzinger was a naval architect in late-nineteenth- and early twentieth-century Austria-Hungary.
The Novara class was a class of three scout cruisers built for the Austro-Hungarian Navy. Named for the Battle of Novara, the class comprised SMS Saida, SMS Helgoland, and SMS Novara. Construction started on the ships shortly before World War I; Saida and Helgoland were both laid down in 1911, Novara followed in 1912. Two of the three warships were built in the Ganz-Danubius shipyard in Fiume; Saida was built in the Cantiere Navale Triestino shipyard in Monfalcone. The Novara-class ships hold the distinction for being the last cruisers constructed by the Austro-Hungarian Navy.
SMS Tegetthoff was the second of four Tegetthoff-class dreadnought battleships built for the Austro-Hungarian Navy. Tegetthoff was named for the 19th-century Austrian Admiral Wilhelm von Tegetthoff, most notable for defeating the Italian Regia Marina at the Battle of Lissa in 1866. The ship was armed with a main battery of twelve 30.5 cm (12.0 in) guns in four triple turrets. Constructed shortly before World War I, she was built at the Stabilimento Tecnico Triestino shipyard in Trieste, where she was laid down in September 1910 and launched in March 1912.
SMS Admiral Spaun was a scout cruiser built for the Austro-Hungarian Navy. Named for Admiral and Marinekommandant Hermann von Spaun, Admiral Spaun was constructed shortly before World War I. Laid down at the Pola Navy Yard in May 1908, the cruiser was launched in October 1909. Admiral Spaun was commissioned into the Navy just over a year later, in November 1910. The first ship of the Austro-Hungarian Navy to be constructed with steam turbines, her design later influenced the construction of the Novara-class cruisers.
SMS Kaiser Franz Joseph I was a protected cruiser built for the Austro-Hungarian Navy. Named for the Austrian emperor and Hungarian king Franz Joseph I, Kaiser Franz Joseph I was the lead ship of her namesake class. Constructed by Stabilimento Tecnico Triestino in Trieste, she was laid down in January 1888 and launched in May 1889. Kaiser Franz Joseph I was commissioned into the Navy in June 1890. As the first protected cruiser constructed by the Austro-Hungarian Navy, she was intended to serve as Austria-Hungary's response to the Italian cruisers Giovanni Bausan and Etna. Her design was heavily influenced by the Jeune École, a naval strategy which had gained prominence in the 1880s as a means to combat a larger and more heavily armored navy of battleships through the use of torpedo flotillas.
Italy 
State of Slovenes, Croats and Serbs 