Insignia of Patrol Squadron 9 (United States Navy).
Official U.S. Navy photograph <a rel="nofollow" class="external autonumber" href="http://www.history.navy.mil/research/histories/naval-aviation-history/insignias/navy-squadron-insignia/vp-insignia/vp-9.html">[1]</a> from the Naval History and Heritage Command <a rel="nofollow" class="external autonumber" href="http://www.history.navy.mil/research/histories/naval-aviation-history/insignias/navy-squadron-insignia/vp-insignia.html">[2]</a>.
US Navy