July 31st - On This Date - RN Submarine Service

1916	J6	Submarine HMS J6 completed
1943	Terrapin	Submarine HMS Terrapin launched
1946	Aeneas	Submarine HMS Aeneas completed
1943	HMS Unsparing	HMS Unsparing torpedoes and sinks the Italian tanker Flegetonte off Bari, Italy.
1945	HMS XE3	XE-3 made a successful attack on a Japanese heavy cruiser of the Atago class at her moorings in Johore Strait, Singapore, on 31st July, 1945 for which a VC was awarded. Leading Seaman Magennis served as Diver in XE-3 during the same attack and was also awarded the VC.
1945	HMS Tiptoe	HMS Tiptoe damages a Japanese coaster with gunfire off the Sunda Strait.

SAB