USS Helios (ARB-12) was one of twelve Aristaeus-class battle damage repair ships built for the United States Navy during World War II.

Named for Helios (in Greek mythology, the sun-god, represented as driving a four-horse chariot through the heavens), she was the only U.S.

She was then converted to a battle damage repair ship by the Maryland Drydock Company of Baltimore and renamed Helios.

By the time she reached Pearl Harbor on 29 September, the long war had come to its end and her services were no longer needed.

Helios decommissioned there on 3 December 1946 and remained in reserve until leased to the government of Brazil on 19 January 1962 and renamed Belmonte (G-24).