The ex-Oriskany, a decommissioned aircraft carrier, was sunk 24 miles off the coast of Pensacola, Fla., on May 17 to form an artificial reef. The 888-foot ship took about 37 minutes to sink below the surface. After 25 years of service to the Navy in operations in Korea, Vietnam and the Mediterranean, ex-Oriskany will now benefit marine life, sport fishing and recreation diving off the coast of the Florida panhandle. U.S. Navy photo by Photographer's Mate 2nd Class Jeffrey P. The ex-Oriskany, a decommissioned aircraft carrier, became the largest ship intentionally sunk as an artificial reef May 17 when it was sunk approximately 24 miles off the coast of Pensacola, Fla.