On delivery the ship was U.S. Coast Guard crewed and assigned to serve the Southwest Pacific area during the war.

After that, it was converted to drill ship Caldrill I, one of the first equipped with dynamic positioning (DP), and to West I as fish processing vessel that on its last trip became part of an insurance fraud by Thomas Edward Utter, described in Trail of the Fox by Lawrence Eric Taylor.

[2] The ship was Coast Guard crewed and assigned to the Southwest Pacific area during the war.

[3] The ship transferred to the Navy 22 February 1947; named Ryer and designated AG-138 on 3 April 1947; and commissioned on 8 June 1947.

Ryer earned six battle stars for service in the Korean War: