A YMS-446 class minesweeper
History
United States
Name	USS YMS-477
Builder	Tacoma Boatbuilding Company, Tacoma, Washington
Laid down	12 July 1943 as PCS-1453
Reclassified	YMS-477, 27 September 1943
Launched	6 November 1943
Commissioned	10 July 1944
Stricken	28 August 1946
Fate	Sold in April 1947, fate unknown
General characteristics
Displacement	320 tons
Length	136 ft 0 in (41.45 m)
Beam	24 ft 6 in (7.47 m)
Draft	6 ft 1 in (1.85 m) (max.)
Propulsion	2 × 880 bhp General Motors 8-268A diesel engines 2 shafts
Speed	12 knots (22 km/h)
Complement	33
Armament	1 × 3"/50 caliber gun mount 2 × 20 mm guns 2 × depth charge projectors

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.

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