April 25th - On This Date - RN Submarine Service

1918	H23	Submarine HMS H23 completed
1918	R1	Submarine HMS R1 launched
1918	R2	Submarine HMS R2 launched
1941	P311	Submarine HMS P311 laid down
1956	Porpoise	Submarine HMS Porpoise launched
1979	Trafalgar	Submarine HMS Trafalgar laid down
1916	HMS E22	HMS E22 was on surface passage in the North Sea. At just after 1150 a torpedo fired from the German submarine UB18 struck the vessel sending her immediately to the bottom. Of the crew of 33 only two survived having been picked up by U18 and taken as Prisoners of War.
1940	HMS Trident	HMS Trident fires two torpedoes against the German merchants Palime and Pelikan about 30 nautical miles south-west of Lindesnes, Norway. Both torpedoes missed.
1941	HMS Upholder	HMS Upholder torpedoes and sinks the Italian Antonietta Lauro, near Kerkennah Buoy #3, Tunisia.
1945	HMS Sea Scout	HMS Sea Scout sinks a Japanese coaster with gunfire off Sumbawa Island, Netherlands East Indies.

SAB