Photo: A Grumman F2F-1 fighter of U.S. Navy fighter squadron VF-2, assigned to the aircraft carrier USS Lexington (CV-2), in flight in the 1930s.

The Grumman F2F was a single-engine biplane with the added bump of retractable undercarriage. Designed for both carrier- and land-based operations, it served as the standard fighter for the US Navy between 1936 and 1940.

The F2F was mainly used by the US Navy, with a couple of variations assigned to the Marine Corps. One of its main features was the addition of watertight compartments to reduce weight and improve survivability in the event of a water landing

The F2F carried one pilot and was armed with two machine guns. It had a max speed of 230mph, and a ceiling of 27,000 feet.