USS Yorktown (CV-5) at Naval Air Station, North Island, San Diego, California, in June 1940, embarking aircraft and vehicles prior to sailing for Hawaii. Aircraft types on her flight deck include TBD-1, BT-1, SBC-3, F3F-2, F3F-3, SB2U, JRF, J2F and JRS-1. Some of these planes were on board for transportation, while others were members of the ship's air group. Three Torpedo Squadron Five (VT-5) TBDs at the after end of the flight deck are painted in experimental camouflage schemes tested during Fleet Problem XXI. (Official U.S. Navy Photograph, now in the collections of the U.S. National Archives)

USS Yorktown (CV-5) at Naval Air Station, North Island, San Diego, California, in June 1940, embarking aircraft and vehicles prior to sailing for Hawaii. Aircraft types on her flight deck include TBD-1, BT-1, SBC-3, F3F-2, F3F-3, SB2U, JRF, J2F and JRS-1. Some of these planes were on board for transportation, while others were members of the ship's air group. Three Torpedo Squadron Five (VT-5) TBDs at the after end of the flight deck are painted in experimental camouflage schemes tested during Fleet Problem XXI. (Official U.S. Navy Photograph, now in the collections of the U.S. National Archives)