June 21st - On This Date - RN Submarine Service

1904	A2	Submarine HMS A2 completed
1916	L3	Submarine HMS L3 laid down
1916	L4	Submarine HMS L4 laid down
1929	Poseidon	Submarine HMS Poseidon launched
1943	Stratagem	Submarine HMS Stratagem launched
1944	Aurochs	Submarine HMS Aurochs laid down
1940	H44	HMS H 44 torpedoes and sinks the small Danish merchant Alfa off Texel, Netherlands.
1942	HMS P514	Sunk by accident in western Atlantic P514 was on passage around the coast of Newfoundland from Argentia to St Johns. On 20 June 1942 P514 left the Canadian village of Argentia bound for St Johns, Newfoundland. At 0300 on the 21st the Canadian minesweeper HMCS Georgian was waiting to provide escort for a convoy bound for Sydney. The Georgian, unaware that any friendly submarines were in the area, assumed that the dark shape of P514 crossing her bow, was an enemy vessel. The Georgian rammed the mystery submarine amidships and reported it sunk. A rescue mission was immediately sent out but no survivors were found. A Board of Enquiry into the accident accepted that the Commanding Officer of the Georgian had acted correctly as there had been no reply from the submarine to his identification challenge.
1944	HMS Universal	HMS Universal sinks the German Guardboat FMa 06 south of Marseille, southern France.
1944	Unsparing	HMS Unsparing sinks the German submarine chaser UJ 2106, the German barge Sybille and the German ferry SF 284 south of Cape Maleas, Greece.
1945	HMS L23	HMS L23 paid off
1950	HMS Sidon	Post refit diving trials were successfully completed.

SAB