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ISLAND VENTURE
Photo by: Kyle Stubbs

Built in 1970, by by the J.M. Martinac Shipbuilding Corporation of Tacoma, Washington (hull #183) as the Sioux for Crowley Marine Services Incorporated of San Francisco, California.

She was the second Seneca class tug constructed for Crowley Marine Services Incorporated.

In 2012, the tug was acquired by the Island Tug and Barge Company of Seattle, Washington. Where the tug was renamed as the Island Venture.

Powered by two, eight cylinder, EMD 8-645-E5 diesel engines. Turning two, cast steel, fixed pitch propellers. She is a twin screw tug, rated at 3,000 horsepower.

Her electrical service is provided by two, 115kW generator sets. The tug's capacities are 51,777 gallons fuel.


  • Vessel Name: ISLAND VENTURE
  • USCG Doc. No.: 527409
  • Vessel Service: TOWING VESSEL
  • IMO Number: 7730525
  • Trade Indicator: Coastwise Unrestricted, Registry
  • Call Sign: WBN7617
  • Hull Material: STEEL
  • Hull Number: 183
  • Ship Builder: MARTINAC SHIPBLDG CORP
  • Year Built: 1970
  • Length: 106.3
  • Hailing Port: SEATTLE, WA.
  • Hull Depth: 10
  • Hull Breadth: 34.3
  • Gross Tonnage: 193
  • Net Tonnage: 81
  • Owner:
    ERIK ELLEFSEN
    3546 WEST MARGINAL WAY SW
    SEATTLE, WA
  • Previous Vessel Names:
    SIOUX, SIOUX
  • Previous Vessel Owners:
    CROWLEY MARINE SERVICES INC, CROWLEY MARINE SERVICES INC, ISLAND TUG AND BARGE CO, ERIK ELLEFSEN, ERIK ELLEFSEN, ERIK ELLEFSEN, ERIK ELLEFSEN, ERIK ELLEFSEN