DULLES, Va.--(BUSINESS WIRE)--Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, will feature a wide range of the company’s products and advanced capabilities as an exhibitor during the Navy League’s 2015 Sea-Air-Space Exposition. Sea-Air-Space is now the largest maritime exposition in the United States and this year’s event takes place at the Gaylord National Resort and Convention Center, National Harbor, Maryland, April 13–15, 2015. The Orbital ATK display is