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USS YMS-477 was a YMS-1-class minesweeper of the YMS-446 subclass built for the United States Navy during World War II. Originally ordered and laid down as USS PCS-1453 on 12 July 1943 by the Tacoma Boatbuilding Company of Tacoma, Washington, planned as a PCS-1376-class minesweeper, the vessel was re-designated YMS-477 of the YMS-1 class on 27 September 1943. The vessel was launched on 6 November and completed four days later. USS YMS-477 was commissioned soon after under the command of Lieutenant (junior grade) Russell V. Malo, USNR.

After wartime service, YMS-477 was decommissioned and then struck from the Naval Vessel Register on 28 August 1946. In April 1947, the former minesweeper was sold, but her ultimate fate is unknown.

References

• Radigan, Joseph M. (2006). "YMS-477". NavSource.org. Retrieved 22 October 2009.