May 23rd - On This Date - RN Submarine Service

1902	No 4	Submarine HMS No 4 launched
1907	C7	Submarine HMS C7 completed
1907	C8	Submarine HMS C8 completed
1935	Spearfish	Submarine HMS Spearfish laid down
1944	Virulent	Submarine HMS Virulent launched
1963	Opossum	Submarine HMS Opossum launched
1940	Truant	HMS Truant fires two torpedoes against the British merchant Alster off the Breidsundet, Norway. The German merchant Alster was captured in the Vestfjord off Norway on 10 April 1940 by the British destroyer HMS Icarus. HMS Truant was unaware of this but fortunately both torpedoes missed their target.
1941	HMS Upholder	HMS Upholder torpedoes a damages the French merchant Capitaine Damiani east of Tunisia.
1944	HMS Sceptre	HMS Sceptre torpedoes and sinks the German merchant Baldur off Castro-Urdiales, northern Spain.
1944	Universal	HMS Universal torpedoes and sinks the German auxiliary gunboat SG 15 off Genua, Italy.
1978	HMS Maidstone	Towed to Inverkeithing to be broken up

SAB