USAAF aircrewmen preparing .50 caliber machine gun ammunition on the flight deck of USS Hornet (CV-8), while the carrier was steaming toward the mission's launching point. Ammunition box in center is marked A.P. M2, Incndy. M1, Trcr. M1, indicating the ammunition types inside: armor piercing, incendiary and tracer. Note wooden flight deck planking, with metal aircraft tiedown strips in place of every eighth plank. U.S. Naval History and Heritage Command Photograph.