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NavSource Online: Service Ship Photo Archive

Mahaska (YTM-730)
ex
 Mahaska (YTB-730) (1945 - 1946)
 Mahaska (YNT-4) (1942 - 1945)
 Mahaska (YN-36) (1941 - 1942)

International Radio Call Sign:
November - India - Kilo - Golf
 NIKG
Awards, Citations and Campaign Ribbons

Precedence of awards is from left to right
American Campaign Medal - World War II Victory Medal
Yard Net Tender:
  • Built by Ira S. Bushey & Sons, Brooklyn, NY (YN 473)
  • Completed for Motor Tug Crusader, Inc., New York, NY, as tug Crusader (ON 239349), 19 March 1940
  • Purchased by the Navy from Bushey, 07 December 1940
  • Delivered to the Third Naval District as Mahaska (YN-36), 09 December 1940
  • Conversion by New York Navy Yard completed, 18 March 1941
  • Allocated to the Fifth Naval District at Net Depot, Hampton Roads, 1941 - 1945
  • Reclassified, Yard Net Tender Tug, YNT-4, 08 April 1942
  • Reclassified Large Harbor Tug (YTB-730), 04 August 1945
  • Reclassified Medium Harbor Tug (YTM-730), 24 November 1961
  • Placed out of service, circa 1970
  • Stricken from Naval Register, 01 February 1970
  • Sold, under bid 16-1030, closed 07 October 1970
  • Registered to Thames Shipyard & Repair Co., New London, CT, as Thameship (ON 545979), 1973
  • Later registered to Thames Towboat Co., New London, CT
  • Final disposition, active, 2025
    Specifications:
    Displacement 220 tons
    Length 101' 0"
    Beam 26' 0"
    Draft 13' 0"
    Speed unknown
    Complement unknown
    Armament unknown
    Propulsion
    one Fairbanks Morse diesel engine
    single propeller, 805shp
    Click On Image
    For Full Size Image    		 Size Image Description Source
    Mahaska (YN-36/YNT-4/YTB-730/YTM-730)
    Mahaska
    140973001    		 90k Mahaska (YN-36) underway, probably near New York Navy Yard during her conversion period, 09 December 1940 - 18 March 1941.
    National Archives photo 19-N-26705 via shipscribe.com    		 Mike Green
    Mahaska
    140973002    		 271k Mahaska (YNT-4) underway, probably in Hampton Roads, VA, 1942-1945. Jim Swank
    Mahaska
    140973004    		 157k Mahaska (YTB-730) moored at Little Creek, VA, 14 May 1959. Photo copyright Ted Stone George Schneider
    Commercial Service
    Mahaska
    140973003    		 609k Undated image of Thameship underway near Groton, CT. Photo copyright Kyle Stubbs Kyle Stubbs
    Mahaska (YN-36 / YNT-4 / YTB-730)
    DANFS history entry located at the 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
    Back To The Navsource Photo Archives Main Page Back To The Yard and District Craft Photo Index Back To The District Craft Net Tenders (YN) Photo Index Back To The District Craft Net Tender Tugs (YNT) Photo Index Back To The District Harbor Tug Large (YTB) Photo Index Back To The District Harbor Tug Medium (YTM) Photo Index
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    This page was created by Gary P. Priolo and is maintained by David L. Wright
    All pages copyright NavSource Naval History
    Last Updated 15 December 2025