February 1st - On This Date - RN Submarine Service

1910	C35	Submarine HMS C35 completed
1910	C36	Submarine HMS C36 completed
1916	W3	Submarine HMS W3 completed
1916	E41	Submarine HMS E41 completed
1915	E53	Submarine HMS E53 laid down
1915	E54	Submarine HMS E54 laid down
1917	K6	Submarine HMS K6 completed
1917	K7	Submarine HMS K7 completed
1917	E48	Submarine HMS E48 completed
1917	K11	Submarine HMS K11 completed
1917	K2	Submarine HMS K2 completed
1943	Subtle	Submarine HMS Subtle laid down
1962	Otus	Submarine HMS Otus laid down
1993	Vengeance	Submarine HMS Vengeance laid down
1917	WWI	German 'unrestricted' submarine warfare begins.
1918	HMS E50	Mined and sunk in the North sea
1942	HMS Thunderbolt	HMS Thunderbolt torpedoes and sinks the Italian merchant Absirtea about 6 nautical miles off Cape Dukato, Greece.
1943	HMS Turbulent	HMS Turbulent torpedoes and sinks the Italian merchant Pozzuoli off Cape San Vito, Sicily, Italy.
1943	HMS Una	HMS Una damages two sailing vessels with gunfire in the Gulf of Hammamet, Tunisia. Una had to break off the attack due to gunfire from shore batteries
1945	HMS Spark	HMS Spark sinks a Japanese coaster and a barge that this coaster is towing and a Japanese tug with gunfire in the western part of the Java Sea. Also another coaster is forced ashore on Panjang Island.
1945	HMS Tantalus	HMS Tantalus sinks a Japanese tug and three barges in the southern part of the South China Sea.
1953	HMS Sirdar	Sirdar was swamped by floods while in dry dock at the naval dockyard at Sheerness, Kent, and later sank.
1954	HMS Sidon	Transferred to 5th Submarine Squadron pending refit.

SAB