Odin-class submarine

The class was built to replace the ageing L-class submarines which did not have adequate endurance for use in the Pacific Ocean. The Odins were theoretically able to dive to , though none were formally tested beyond . Armament consisted of eight torpedo tubes (6 bow, 2 stern) and one gun. The boats were of a saddle tank type with fuel carried in riveted external tanks. These external tanks proved vulnerable to leaking after depth-charge damage, thus betraying the position of the submarine. These boats were the first British submarines fitted with Asdic and VLF radio which could be used at periscope depth. ==Boats==