HMS Thorough (P324), a T-class submarine
HMS Thorough (P324), a T-class submarine. The class were equipped with an impressive battery of 8 21-inch bow tubes (2 external) as well as two amidship tubes, with 17 torpedoes carried. However, Thourogh by far used her forward 4-inch mount, 20mm stern Oerlikon cannon, and trio of .303 machine-guns more.