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.