USS Chain (ARS-20/T-AGOR-17) was a Diver-class rescue and salvage ship commissioned by the United States Navy during World War II.

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.

Her essential support played an important, if humble, part in enabling the 4th Fleet to carry out its mission of protecting the South Atlantic Ocean.

Chain operated along the U.S. East Coast, towing barges and decommissioned ships until she grounded in Block Island Sound 29 March 1946.

Quickly floated by Coast Guard Cutter Dix, Chain's bottom was heavily damaged, and from 3 April until 25 June, she was repaired at New London, Connecticut.