The Mitsubishi F1M (Allied reporting name "Pete") was a Japanese reconnaissance floatplane of World War II. It was the last biplane type of the Imperial Japanese Navy, with 1,118 built between 1936 and 1944. The Navy designation was "Type Zero Observation Seaplane".
The F1M was originally built as a catapult-launched reconnaissance float plane, specializing in gunnery spotting. The "Pete" took on a number of local roles including convoy escort, bomber, anti-submarine, maritime patrol, rescue, transport, and anti-shipping strike; for example sinking Motor Torpedo Boat PT-34 on 9 April 1942. The type was also used as an area-defense fighter and engaged in aerial combat in the Aleutians, the Solomons and several other theaters. In the New Guinea front, it was often used in aerial combat with the Allied bombers and Allied fighters.