Tags: Weapon.
The Mark 24 mine (also known as FIDO or Fido) was a US air-dropped passive acoustic homing anti-submarine torpedo used during the Second World War against German and Japanese submarines. It entered service in March 1943 and continued in service with the US Navy until 1948. Approximately 4000 torpedoes were produced sinking 37 and damaging a further 18 submarines out of a total of 204 fired. The torpedo was also supplied to the British and Canadian forces.