The heavy armament consisted of six 21-inch bow tubes (two external) and four 21-inch stern tubes (two external) - with 20 torpedoes carried. The class was also fitted with one 4-inch gun forward of the conning tower, one 20mm Oerlikon cannon and three portable 0.303-inch machine guns.
As the final act was being played out in the distant theatre of the Pacific, it is interesting to recall the words Sir Winston Churchill used to express to the submarine branch of the Royal Navy the nation's gratitude for the difficulties and dangers it faced during the Second World War - 'Of all the branches of men in the. Forces there is none that shows more devotion and faces greater perils than the submariner ..... Great deeds are done in the air
