June 15th - On This Date - RN Submarine Service

1916	G12	Submarine HMS G12 completed
1916	G9	Submarine HMS G9 launched
1933	Salmon	Submarine HMS Salmon laid down
1954	Porpoise	Submarine HMS Porpoise laid down
1982	Hebe	Depot Ship HMS Hebe launched
1940	Rorqual	HMS Rorqual makes an unsuccesful torpedo attack on an Italian submarine in the Strait of Otranto.
1941	HMS Thunderbolt	HMS Thunderbolt fires torpedoes at the German submarine U-557 in the North Atlantic. The torpedoes miss.
1942	HMS Umbra	HMS Umbra fires torpedoes at the Italian battleship Littorio but the torpedoes miss the target. Later HMS Umbra torpedoes and sinks the Italian heavy cruiser Trento.
1943	HMS Ultor	HMS Ultor sinks the Italian auxiliary minesweeper Tullio/No.92
1944	HMS Satyr	HMS Satyr sank the German submarine U-987 in the North Sea west of Narvik.
1945	HMS Taciturn	HMS Taciturn sinks a Japanese air warning picket hulk and the Japanese auxiliary submarine chaser Cha 105 with gunfire in the Madoera Strait to the north of Surabaya, Java, Netherlands East Indies.

SAB