July 4th - On This Date - RN Submarine Service

1939	Tetrarch	Submarine HMS Tetrarch completed
1939	Thistle	Submarine HMS Thistle completed
1942	Tantivy	Submarine HMS Tantivy laid down
1776	American independence	American colonies declare their independence from Great Britain
1842	Torpedo Test	First test of electrically operated underwater torpedo sinks gunboat Boxer
1940	HMS Narwhal	HMS Narwhal lays minefield FD 21 (50 mines) north of Kristiansund, Norway.
1941	HMS Torbay	HMS Torbay sinks two German sailing vessels with gunfire in the Doro Channel.
1942	HMS Turbulent	While on patrol off Benghazi, Libya HMS Turbulent fires torpedoes at the Italian transport Nino Bixio and the German transport Ankara. The torpedoes miss.
1943	HMS Trident	HMS Trident sinks two sailing vessels with gunfire off Symi.
1943	HMS Unseen	While on patrol off Cape Rizzuto, Calabria, Italy, HMS Unseen fires four torpedoes against what is identified as an Italian Regolo-class light cruiser. All torpedoes missed.
1944	HMS Sturdy	HMS Sturdy sinks two Japanese tugboats and three barges with gunfire off the west coast of Siam.
1944	HMS Vox	HMS Vox torpedoes and sinks a German sailing vessel off Santorini Island, Greece.

SAB