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ENSIGN
Photo by: John Curdy

Built in 1977, by McDermott Shipyard Incorporated of Morgan City, Louisiana (hull #227) as the Ensign for Crowley Marine Services Incorporated of San Francisco, California

She was the twenty fourth Invader class tug constructed by McDermott Shipyards for Crowley Marine Services Incorporated.

Powered by two, twenty cylinder, EMD 20-645-EG diesel engines. With Falk reduction gears, at a ratio of 4.345:1. Turning two, five bladed, stainless steel, fixed pitch propellers. For a rated 7,200 horsepower.

Her electrical service is provided by two, 90kW, Caterpillar D 3304 generator sets. The tug's capacities are 155,000 gallons of fuel oil, 3,300 gallons of lube oil, and 15,000 gallons of potable water,

The towing equipment consists of a double drum, Markey TDSDW 36C, towing winch. Outfitted with 3,000(ft) of 2.75(in) towing wire on each drum.


  • Vessel Name: ENSIGN
  • USCG Doc. No.: 581177
  • Vessel Service: TOWING VESSEL
  • IMO Number: 7726536
  • Trade Indicator: Coastwise Unrestricted, Registry
  • Call Sign: WBN3012
  • Hull Material: STEEL
  • Hull Number: 227
  • Ship Builder: MCDERMOTT SHIPYARD
  • Year Built: 1977
  • Length: 128.6
  • Hailing Port: SAN FRANCISCO, CA.
  • Hull Depth: 19.2
  • Hull Breadth: 36.5
  • Gross Tonnage: 199
  • Net Tonnage: 135
  • Owner:
    CROWLEY PUERTO RICO SERVICES INC
    9487 REGENCY SQUARE BLVD
    JACKSONVILLE, FL 32225
  • Previous Vessel Owners:
    CROWLEY MARINE SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC, CROWLEY PUERTO RICO SERVICES INC