German Submarine Killer, Royal Navy Fairey Swordfish Torpedo Bomber, Dunsfold Airshow 2013. The Fairey Swordfish was a torpedo bomber biplane designed by the Fairey Aviation Company and used by the Fleet Air Arm of the Royal Navy during the Second World War. Originating in the 1930s, the Swordfish, nicknamed "Stringbag", was an outdated design by the start of the war in 1939, but remained in front-line service until VE Day, outliving several types intended to replace it. It was initially operated primarily as a fleet attack aircraft; during its later years it was used as an anti-submarine and training craft.