Patrol Squadron 31 (VP-31) was a U.S. Navy Fleet Replacement Squadron established on 30 June 1960 at Naval Air Station (NAS) North Island, California. Its primary mission was to train crews and maintenance personnel for patrol squadrons operating the P-2 Neptune, P-3 Orion, and other maritime patrol aircraft. VP-31 played a crucial role in preparing new aircrews for anti-submarine warfare (ASW) and maritime reconnaissance missions throughout the Cold War and beyond. The squadron was disestablished on 1 November 1993 as part of Navy post-Cold War drawdowns.
