AIR & SPACE MAGAZINE Triad The earliest U.S. Navy aircraft. Photo: U.S. Navy April 19, 2011 110211-N-2688M-142 SAN DIEGO (Feb. 11, 2011) A functional replica of a Curtiss A-1 Triad seaplane skims the water in San Diego Bay in front of the aircraft carrier USS John C. Stennis (CVN 74) during a demonstration at Naval Air Station North Island. The A-1 Triad was the first Navy plane purchased by the Navy. The A-1 Triad was the first plane purchased by the Navy. The A-1 Triad replica is taking part in the Centennial of Naval Aviation Open House and Parade of Flight event on Feb. 12. The Navy is observing the Centennial of Naval Aviation with a series of nationwide events celebrating 100 years of heritage, progress and achievement in naval aviation. (U.S. Navy photo by Mass Communication Specialist 2nd Class Joseph Moon/Released) U.S. Navy Get the latest stories in your inbox every weekday.