USS Preserver (ARS-8) was a Diver-class rescue and salvage ship commissioned by the U.S. Navy for service in World War II. She was responsible for coming to the aid of stricken vessels. Preserver (ARS–8), a salvage ship, was laid down by Basalt Rock Company in Napa, California, 26 October 1942; launched 1 April 1943; sponsored by Mrs. Walter F. LaFranz; and commissioned 11 January 1944, Lt. Comdr. A. T. Ostrander in command.