Initially named "Spector", the ship was laid down on 5 September 1943 by Associated Shipbuilders, Seattle, Washington; launched on 15 February 1944, sponsored by Miss Carol D. Petrie, and commissioned on 30 August 1944, Lt. J. Chevalier, USNR, in command. "Specter" departed Seattle on 16 September en route to San Pedro, California. She conducted shakedown training off San Pedro and San Diego, California, from 21 September to 19 October. The minesweeper sailed from San Pedro on 9 November for Hawaii and arrived at Pearl Harbor on 18 November 1944. Following training in gunnery, antisubmarine warfare, and minesweeping operations, she sailed on 22 January 1945 for the Volcano Islands.