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NavSource Online: Service Ship Photo Archive

Unadilla (YTM-4)
Unadilla (YT-4) (1920 - 1944)
Unadilla (Harbor Tug No. 4) (1895 - 1920)

International Radio Call Sign:
November - Echo - Foxtrot - Tango
Awards, Citations and Campaign Ribbons

Precedence of awards is from top to bottom, left to right
Top Row - World War I Victory Medal
Bottom Row - American Defense Service Medal - American Campaign Medal - World War II Victory Medal

District Harbor Tug:
  • Built by Mare Island Navy Yard, Vallejo, CA
  • Authorized, 26 July 1894
  • Laid down, 29 April 1895
  • Launched, 21 September 1895
  • Placed in service as Unadilla (Harbor Tug No. 4), Sailmaker William Redstone commanding, February 1896
  • Unadilla spent her entire career assigned to the Twelfth Naval District at Mare Island Navy Yard
  • Designated District Harbor Tug (YT-4), 17 July 1920
  • Redesignated District Harbor Tug Medium (YTM-4), 15 May 1944
  • Placed out of service, September 1945
  • Struck from the Naval Register, May 1947
  • Transferred to the War Shipping Administration, May 1947
  • Final Disposition, fate unknown, probably scrapped 1947-48
    Hull Steel
    Displacement 345 tons
    Length 110' 0"
    Beam 25' 0"
    Draft 9' 11"(mean)
    Speed 12 knots
    Complement unknown
    Armament none
    one single-ended triple-expansion reciprocating steam engine
    one coal-fired boiler
    single propeller, 500ihp
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    Unadilla is an Iroquoian noun meaning "meeting place." DANFS described the tug's namesake as "a river which rises in Columbia County, New York, and meanders southwesterly before emptying into the Susquehanna River." There are also several towns of the same name in Georgia, Nebraska, New York and Michigan, as well as a former settlement in Kern County, California.
    New York state historical marker of the Unadilla River in Chenango County. Photo by "Chenango Historian" via Wikimedia Commons.

    Dave Wright
    Unadilla (Harbor Tug No. 4 / YT-4 / YTM-4)
    1607k Invitation to the launching of US Tug Unadilla, 21 September 1895. Darryl Baker
    164k Unadilla ready for launching at Mare Island, 21 September 1895.
    Naval History & Heritage Command photo NH 74753
    Mike Green
    200k Unadilla being launched at Mare Island, 21 September 1895.
    Naval History & Heritage Command photo NH 71248
    Mike Green
    149k Undated photo of Unadilla at Mare Island, probably soon after completion.
    Naval History & Heritage Command photo NH 71717
    Mike Green
    636k Pen and ink drawing of the new tugboat Unadilla at Jackson Street Wharf, San Francisco.
    From San Francisco Call, 28 March 1896
    Dave Wright
    70k Unadilla alongside USS Scindia off Mare Island Navy Yard, circa 1899.
    Naval History & Heritage Command photo NH 71734, courtesy San Francisco Maritime Museum
    3093k Unadilla outboard and alongside the decommissioned cruiser Boston at Mare Island Navy Yard in September 1899. USS Solace (after section visible) is moored pierside forward of Boston and Unadilla.
    File name: MINSY Sep 1899 03 Boston, Unadilla and Solace
    Darryl Baker
    674k USS Hancock underway with the assistance of USS Active on the starboard side and likely Unadilla on the port side off Mare Island Navy Yard, date unknown.
    Naval History & Heritage Command photo NH 84408
    Darryl Baker
    1465k USS Alert under tow by the tug Unadilla in San Francisco Bay, circa 1902. Darryl Baker
    80k Unadilla alongside the gunboat USS Concord off Mare Island Navy Yard, Vallejo, CA, 26 June 1903.
    Navy Yard Mare Island photo
    Darryl Baker
    890k Unadilla after running aground in fog on Angel Island, San Francisco Bay, 24 October 1904. She was pulled off without damage by the Army tug General Slocum the next day.
    Image from San Francisco Chronicle, 25 October 1904
    Darryl Baker
    179k Unadilla alongside the Mare Island Navy Yard "Flusher." The "Flusher" in operation at the shipyard's torpedo boat wharf, 13 December 1906. A possible explanation for the function of the "Flusher" is that it was used to clear mud away from the dry dock caisson. Mare Island at this time only had a bucket dredge, and they may have been afraid that it would punch a hole in the caisson when clearing the mud from the dry dock sill area. The other three dry docks were built with installed flusher systems to clear the caisson dry dock sill area.
    Mare Island Navy Yard photo # MINSY 778-12-1906
    Darryl Baker
    1166k Unadilla moored pierside at Mare Island Navy Yard, circa 1906-07.
    Naval History & Heritage Command photo NH 71703
    Darryl Baker
    272k Unadilla is to port of USS Ontario (Fleet Collier No. 2) as she is waterborne for the first time after launching at Mare Island, 05 December 1908.
    US Navy photo
    Darryl Baker
    380k Unadilla is to port of USS Ontario (Fleet Collier No. 2) entering the water for the first time during her launching at Mare Island, 05 December 1908. Other ships in photo left to right: USS Fortune (Harbor Tug No. 11), and USS Active (Harbor Tug No. 14) to the far right.
    US Navy photo
    Darryl Baker
    2007k Unadilla dry docked in the middle position at the far end of the Dry Dock #2 at Mare Island Navy Yard, 14 December 1911. USS Cleveland (C-19) is to the left of the dry dock and in the dry dock with Unadilla are USS Preble (Destroyer # 12) (left) USS Farragut (Torpedo Boat # 11) (right), next is USS Hopkins (Destroyer # 6) and USS Perry (Destroyer # 11).
    MINSY photo # 223-12-1911, Navy Photo, 12/14/1911.
    Darryl Baker
    83k Unadilla stands by as the collier USS Jupiter is launched at Mare Island Navy Yard, 14 August 1912. The boat aft of Unadilla is a commercial Vallejo to Mare Island ferry.
    Navy Yard Mare Island photo # AC 3 005-8-12
    Darryl Baker
    92k Unadilla assists the collier USS Jupiter in the Mare Island Channel after launching, 14 August 1912.
    Navy Yard Mare Island photo # AC 3 007-8-12
    Darryl Baker
    194k Broadside view of Unadilla in her berth at Navy Yard Mare Island, circa 1915-16.
    Navy Yard Mare Island photo
    Darryl Baker
    1227k Unadilla alongside USS Celtic (AF-2) in the Mare Island channel in June 1920. Shipyard logs indicate Celtic was in overhaul at Mare Island Navy Yard from 8 December 1919 until 25 June 1920.
    Navy photos AF 2 1920 02 and 03, June 1920
    Darryl Baker
    905k Unadilla (YT-4) moored along the seawall at Mare Island, 31 October 1923.
    MINSY photo 4667-10-23, from the collection of Vallejo Naval & Historical Museum.
    Darryl Baker

    Unadilla (YT-4 / YTM-4)
    DANFS history entry located at the US Naval History and Heritage Command website
    Crew Contact And Reunion Information
    U.S. Navy Memorial Foundation - Navy Log

    Additional Resources and Web Sites of Interest
    National Association of Fleet Tug Sailors

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    This page was created by Gary P. Priolo and is maintained by David L. Wright
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    Last Updated 30 March 2018