September 15th - On This Date - RN Submarine Service

1917                Submarine HMS L21 laid down

1956                Submarine HMS Finwhale laid down

1966                Submarine HMS Resolution launched

1941                Submarine depot ship HMS Forth commences refit in USA

1941                HMS Tigris fires four torpedoes against the German merchant Bessheim in Lopphavet, Norway. All torpedoes missed.

1944                HMS Voracious fires three torpedoes against the German auxiliary submarine chaser UJ 2110 5 nautical miles north of Skopelos Island, Greece. All torpedoes miss.

1958                HMS Sleuth scrapped at Charlestown