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USS Sotoyomo (YTM-9/YT-9/Harbor Tug No.9) was a harbor tug built at the turn of the twentieth century. She saw service in both World War I and World War II and was heavily damaged by the Attack on Pearl Harbor. Sotoyomo was the oldest vessel at Pearl Harbor in service at the time of the attack.[1]

USS Sotoyomo (YTM-9)
USS Sotoyomo (YT-9) in Navy Yard, Puget Sound, Washington: March 17, 1921
USS Sotoyomo in Navy Yard, Puget Sound, Washington.
United States
Builder: Mare Island Navy Yard, Vallejo, California
Laid down: 2 March 1903
Launched: 20 August 1903
Christened: 21 April 1904
Completed: 1 March 1904
Commissioned: 1 July 1911
  • YT-9 – 17 July 1920
  • YTM-9 – 15 May 1944
Struck: 26 February 1946
Identification: Harbor Tug No.9
Honors and
Fate: Scuttled off Leyte, September 1946
General characteristics
Type: Harbor tug
Displacement: 230 tons
Length: 97 ft (30 m)
Beam: 21 ft 11 in (6.68 m)
Draft: 9 ft 0 in (2.74 m)
Installed power: one 13" x 32" steam engine one coal-fired single ended cylindrical boiler,
Propulsion: single propeller 450shp
Speed: 11.1 kn (20.6 km/h; 12.8 mph)
Complement: 9



Sotoyomo was laid down in 1903 and struck in 1946. It served in both World War I and World War II.[2]

The name Sotoyomo commemorates a part of the war-like Sioux tribe of Indians.[3]

Attack on Pearl HarborEdit

USS Sotoyomo was in the same floating dry dock when the USS Shaw exploded: December 7, 1941

Sotoyomo was in floating dry dock YFD-2 with USS Shaw undergoing overhaul when Pearl Harbor was attacked 7 December 1941. Explosions and fires on Shaw greatly damaged Sotoyomo which resulted in total submersion. Originally Sotoyomo was deemed a total loss, but she was later refloated, repaired, and rehabilitated.[3]

Further service in World War IIEdit

Sotoyomo served throughout World War II in various locations across the Pacific.



  1. ^ World War II Informational Fact Sheets. Education Resources Information Center. p. 52.
  2. ^ "Sotoyomo (YTM-9)". NavSource Naval History. Retrieved 17 December 2016.
  3. ^ a b Wallin, Homer N. (1968). Pearl Harbor: Why, How, Fleet Salvage and Final Appraisal (PDF). Naval History Division. p. 206.