Swordfish

The Fairey Swordfish was a biplane torpedo bomber designed by the Fairey Aviation Company. Originating in the early 1930s, the Swordfish, nicknamed "Stringbag", was operated by the Fleet Air Arm of the Royal Navy, in addition to having been equipped by the Royal Air Force (RAF) alongside multiple overseas operators, including the Royal Canadian Air Force (RCAF) and the Royal Netherlands Navy. It was initially operated primarily as a fleet attack aircraft; during its later years, the Swordfish became increasingly used as an anti-submarine and training platform. The type was in frontline service throughout the entirety of the Second World War, but it was already considered obsolescent at the outbreak of the conflict in 1939. Wikipedia