The Mark 43 was an anti-submarine homing torpedo designed to be carried and launched by helicopters, aircraft, and surface ships.

Some 2.3 metres long, 25 centimetres in diameter, and weighing about 120 kilograms, the Mark 43 was smaller and much lighter than its predecessors. As the performance of Soviet submarines increased, newer homing torpedoes were developed to counter them, and the Mark 43 was ultimately replaced by weapons with higher speed and greater range. Westinghouse Canada and the Royal Canadian Navy donated this torpedo to the Canadian War Museum after it was used in a 1960 exhibition relating to the navy's 50th anniversary.

Homing Torpedo, Mk 43 Mod 3
CWM 19610005-001