November 18th - On This Date - RN Submarine Service

1917	L1	Submarine HMS L1 completed
1937	Taku	Submarine HMS Taku laid down
1941	Safari	Submarine HMS Safari launched
1942	Vulpine	Submarine HMS Vulpine laid down
1942	Varne	Submarine HMS Varne laid down
1947	Anchorite	Submarine HMS Anchorite completed
1917	HMS K1	Damaged off Danish Coast after collision with HMS K4. Sunk to avoid capture
1941	HMS Sealion	HMS Sealion sinks the Norwegian tanker Vesco off the Laksefjord, Norway.
1942	HMS Trusty	HMS Trusty torpedoes and damages the Japanese troop transport Columbia Maru near Penang, Malaya.
1942	Porpoise	HMS Porpoise torpedoes and sinks the Italian tanker Giulio Giordani about 45 nautical miles north-east of Misurata, Libya.
1942	U-331	Already damaged and unable to dive, U-331 was sunk west of Algiers by torpedo from an Albacore from HMS Formidable. There were seventeen survivors, of which five were wounded.
1943	HMS Sickle	HMS Sickle sinks a sailing vessel with gunfire off Leros island, Greece.
1944	HMS Tally-Ho	HMS Tally-Ho sinks three Japanese sailing vessels with gunfire in the Strait of Malacca.