USS Chain (ARS-20/T-AGOR-17) was a Diver-class rescue and salvage ship commissioned by the U.S. Navy during World War II. Her task was to come to the aid of stricken vessels. Chain (ARS 20) was launched 3 June 1943 by Basalt Rock Company in Napa, California; sponsored by Mrs. P. F. Roach; and commissioned 31 March 1944, Lieutenant Commander F. J. George, USNR, in command.