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.
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.
The Navy of the Independent State of Croatia, was the navy of the Independent State of Croatia, an Axis puppet state controlled by the fascist Ustaše party. The NDH was created from parts of the Kingdom of Yugoslavia on 10 April 1941, four days after the World War II invasion of Yugoslavia by the Axis powers commenced. The RMNDH consisted of two commands, the Coast and Maritime Traffic Command, and the River and River Traffic Command, and had its headquarters in the NDH capital, Zagreb. The Coast and Maritime Traffic Command consisted of three naval commands along the Adriatic coast, which were each divided into a number of naval districts. The naval districts consisted mainly of naval and weather stations, and were only responsible for coast guard and customs duties. The River and River Traffic Command consisted of seven river stations, a naval infantry battalion, and a River Command Flotilla built around two former Yugoslav river monitors, which had been scuttled during the invasion but subsequently refloated.
SMS Tiger was a torpedo cruiser built for the Austro-Hungarian Navy in the mid-1880s. An enlarged and improved version of the Panther class, she was part of a program to build up Austria-Hungary's fleet of torpedo craft in the 1880s. The Panther class, purchased from a British shipyard, was acquired in part to gain experience building cruisers of the type; this provided the basis for the design of Tiger. She was laid down at the Stabilimento Tecnico Triestino shipyard in October 1886, she was launched in June 1887, and was completed in March 1888. The ship was armed with a battery of four 12 cm (4.7 in) guns and three 35 cm (14 in) torpedo tubes, and was capable of speeds in excess of 19 knots.
T3 was a sea-going torpedo boat that was operated by the Royal Yugoslav Navy between 1921 and 1941. Originally 78 T, a 250t-class torpedo boat of the Austro-Hungarian Navy built in 1914, she was armed with two 66 mm (2.6 in) guns, four 450 mm (17.7 in) torpedo tubes, and could carry 10–12 naval mines. She saw active service during World War I, performing convoy, escort and minesweeping tasks, anti-submarine operations and shore bombardment missions. Following Austria-Hungary's defeat in 1918, she was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which subsequently became the Royal Yugoslav Navy, and was renamed T3. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
The Royal Navy, commonly the Royal Yugoslav Navy, was the naval warfare service branch of the Kingdom of Yugoslavia. It was brought into existence in 1921, and initially consisted of a few former Austro-Hungarian Navy vessels surrendered at the conclusion of World War I and transferred to the new nation state under the terms of the Treaty of Saint-Germain-en-Laye. The only modern sea-going warships transferred to the new state were twelve steam-powered torpedo boats, although it did receive four capable river monitors for use on the Danube and other large rivers. Significant new acquisitions began in 1926 with a former German light cruiser, followed by the commissioning of two motor torpedo boats (MTBs) and a small submarine flotilla over the next few years. When the name of the state was changed to Yugoslavia in 1929, the name of its navy was changed to reflect this. In the late 1920s, several of the original vessels were discarded.
SMS Niobe was the second member of the ten-ship Gazelle class of light cruisers that were built for the German Kaiserliche Marine in the late 1890s and early 1900s. The Gazelle class was the culmination of earlier unprotected cruiser and aviso designs, combining the best aspects of both types in what became the progenitor of all future light cruisers of the Imperial fleet. Built to be able to serve with the main German fleet and as a colonial cruiser, she was armed with a battery of ten 10.5 cm (4.1 in) guns and a top speed of 21.5 knots. The ship had a long career, serving in all three German navies, along with the Yugoslav and Italian fleets over the span of more than forty years.
T1 was a seagoing torpedo boat that was operated by the Royal Yugoslav Navy between 1921 and 1941. Originally 76 T, a 250t-class torpedo boat of the Austro-Hungarian Navy built in 1914, she was armed with two 66 mm (2.6 in) guns and four 450 mm (17.7 in) torpedo tubes, and could carry 10–12 naval mines. She saw active service during World War I, performing convoy, escort and minesweeping tasks, anti-submarine operations and shore bombardment missions. She was part of the escort force for the Austro-Hungarian dreadnought SMS Szent István during the action that resulted in the sinking of that ship by Italian torpedo boats in June 1918. Following Austria-Hungary's defeat later that year, 76 T was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which became the Royal Yugoslav Navy, and was renamed T1. At the time, she and seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
SMS Kaiser Max was an ironclad warship built for the Austro-Hungarian Navy in the 1870s, the lead ship of the Kaiser Max class. The ship was purportedly the same vessel that had been laid down in 1861, and had simply been reconstructed. This was a fiction, however; the head of the Austro-Hungarian Navy could not secure funding for new ships, but reconstruction projects were uncontroversial, so he "rebuilt" the three earlier Kaiser Max-class ironclads. Only the engines and parts of the armor plate were reused in the new Kaiser Max, which was laid down in February 1874, launched in December 1875, and commissioned in October 1876. The ship's career was fairly limited, in part due to slender naval budgets that prevented much active use. She made foreign visits and took part in limited training exercises in the 1880s and 1890s. Long since obsolete, Kaiser Max was removed from service in 1904 and converted into a barracks ship. After World War I, the ship was transferred to the Royal Yugoslav Navy as a war prize and renamed Tivat. Her fate thereafter is uncertain, either being sold for scrap in 1924 or retained through 1941.
The Kaiser Max class of ironclad warships was a group of three casemate ships built for the Austro-Hungarian Navy in the 1870s: Kaiser Max, Don Juan d'Austria, and Prinz Eugen. The three ships were ostensibly the same vessels as the earlier Kaiser Max class, though they were in fact entire new vessels. Only parts of the earlier ships' machinery, armor plating, and other equipment were reused in the new ironclads. The ships were all laid down in 1874; the first two were launched in 1875 and completed in 1876, while work on Prinz Eugen proceeded much more slowly. She was launched in 1877 and completed in 1878. The three ships were armed with a battery of eight 21-centimeter (8.3 in) guns mounted in a central, armored casemate, and were capable of a top speed of 13.28 knots.
The Albona class were mine warfare ships used by the Regia Marina and Royal Yugoslav Navy (KJRM). Fourteen ships were originally laid down between 1917 and 1918 for the Austro-Hungarian Navy as the MT.130 class. However, the end of World War I and the dissolution of Austria-Hungary left them incomplete until 1920, when three ships were finished for the Regia Marina. An additional five ships were completed for the KJRM in 1931 as the Malinska class.
T7 was a sea-going torpedo boat operated by the Royal Yugoslav Navy between 1921 and 1941, after spending World War I in Austro-Hungarian Navy service. Originally 96 F, she was a 250t-class torpedo boat, and saw active service during World War I, performing convoy, patrol, escort and minesweeping tasks, and anti-submarine operations. Following Austria-Hungary's defeat in 1918, 96 F was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which later became the Royal Yugoslav Navy, and was renamed T7. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
The Yugoslav torpedo boat T5 was a sea-going torpedo boat operated by the Royal Yugoslav Navy between 1921 and 1941. Originally 87 F, a 250t-class torpedo boat of the Austro-Hungarian Navy built in 1914–1915, she was armed with two 66 mm (2.6 in) guns and four 450 mm (17.7 in) torpedo tubes, and could carry 10–12 naval mines. She saw active service during World War I, performing convoy, patrol, escort and minesweeping tasks, anti-submarine operations and shore bombardment missions. Following Austria-Hungary's defeat in 1918, 87 F was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which became the Royal Yugoslav Navy, and was renamed T5. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
The Schichau class consisted of 22 torpedo boats built for the Austro-Hungarian Navy between 1885 and 1891. The class was one of the first torpedo boat classes built for the Austro-Hungarian Navy, and they were initially powered by steam from a single locomotive boiler and were armed with two 37 mm (1.5 in) Hotchkiss guns and two 356 mm (14 in) torpedo tubes. The entire class was reconstructed between 1900 and 1910, when they received two Yarrow boilers and a second funnel.
Beli Orao was a royal yacht built in 1938–39 for the Yugoslav Royal Navy, which intended her to serve as a patrol boat, escort, or guard ship in wartime. Upon completion, she was pressed into service as the admiralty yacht – used by senior admirals for transport and to review fleet exercises. She was captured in April 1941 by the Italians during the World War II Axis invasion of Yugoslavia. The Regia Marina replaced her guns and used her as a gunboat for harbour protection and coastal escort duties, briefly as Alba then Zagabria. She was then used to train anti-submarine warfare specialists from the naval base at La Spezia.
T6 was a sea-going torpedo boat that was operated by the Royal Yugoslav Navy between 1921 and 1941, after spending World War I in Austro-Hungarian Navy service. Originally 93 F, she was a 250t-class torpedo boat built in 1915–1916. She saw active service during World War I, performing convoy, escort, patrol and minesweeping tasks, and anti-submarine operations. Following Austria-Hungary's defeat in 1918, 93 F was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which later became the Royal Yugoslav Navy, and was renamed T6. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
T8 was a sea-going torpedo boat that was operated by the Royal Yugoslav Navy between 1921 and 1941, after spending World War I in Austro-Hungarian Navy service. Originally 97 F, she was a 250t-class torpedo boat, which saw active service during World War I, performing convoy, patrol, escort and minesweeping tasks, and anti-submarine operations. Following Austria-Hungary's defeat in 1918, 97 F was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which later became the Royal Yugoslav Navy, and was renamed T8. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force.
T2 was a seagoing torpedo boat operated by the Yugoslav Royal Navy between 1921 and 1939, after being commissioned in August 1914 and spending World War I in Austro-Hungarian Navy service. Originally 77 T, she was a 250t-class torpedo boat, a class built to address the expectation that the Strait of Otranto, where the Adriatic Sea meets the Ionian Sea, would be blockaded by hostile forces during a future conflict. She saw active service during World War I, performing convoy, patrol, escort, minesweeping and minelaying tasks, anti-submarine operations, and shore bombardment missions. In 1917 the suffixes of all Austro-Hungarian torpedo boats were removed, and thereafter she was referred to as 77.
T4 was a seagoing torpedo boat operated by the Royal Yugoslav Navy between 1921 and 1932, after spending World War I in Austro-Hungarian Navy service. Originally 79 T, she was a 250t-class torpedo boat, and was laid down on 1 December 1913, launched on 30 April 1914 and completed on 30 September of that year. She saw active service during World War I, performing convoy, patrol, escort and minesweeping tasks, anti-submarine operations and shore bombardment missions. Following Austria-Hungary's defeat in 1918, 79 T was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which later became the Royal Yugoslav Navy, and was renamed T4. At the time, she and the seven other 250t-class boats were the only modern sea-going vessels of the fledgling maritime force. During the interwar period, T4 and the rest of the navy were involved in training exercises and cruises to friendly ports, but activity was limited by reduced naval budgets. In 1932, she ran aground on the Dalmatian coast and became a total loss.
Austria-Hungary 
Kingdom of Yugoslavia 
Italy
Socialist Federal Republic of Yugoslavia