Originally planned as a patrol craft escort (PCE-879), she was laid down on 27 May 1943 by the Albina Engine & Machine Works of Portland, Oregon; launched 30 September 1943; reclassified YDG-9 on 23 December 1943; and commissioned 10 July 1944.

Following shakedown and training out of San Pedro, Los Angeles, YDG-9 continued operations on the west coast, first for the 11th Naval District and then as a unit of ServRon 8.

Later assigned to SevRon 6 to service, in close proximity, the striking forces as they moved closer to Japan, she established and operated degaussing ranges and provided facilities for inspection, calibration, and adjustment of shipboard degaussing equipment in forward areas, primarily for minesweepers.

After World War II ended, she operated with mine groups at Okinawa and, after 29 January 1946 at Sasebo, Japan as those groups cleared the waters to allow safe passage to both military and merchant shipping.

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.