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DANIEL FOSS
Photo by: Phil Gilston

Built in 1977, by Main Iron Works of Houma, Louisiana (hull #319) as the Mamo II Dillingham Tug and Barge.

The tug was later acquired by Foss Maritime where she was renamed as the Daniel Foss .

In 2006, the tug was reconfigured from a Voith cycloidal drive unit to a azimuthing stern drive configuration. Powered by three Caterpillar 3512 B diesel engines with two stern mounted Ulstein 900 NautiCAN "z-drives" with a third Ulstein 900H UHPN "z-drive" mounted forward for a rated 3,300 horsepower.


  • Vessel Name: DANIEL FOSS
  • USCG Doc. No.: 581354
  • Vessel Service: TOWING VESSEL
  • IMO Number: 7638454
  • Trade Indicator: Coastwise Unrestricted, Registry
  • Call Sign: WTS3171
  • Hull Material: STEEL
  • Hull Number: 319
  • Ship Builder: MAIN IRON WORKS INC
  • Year Built: 1977
  • Length: 94.7
  • Hailing Port: SEATTLE WA
  • Hull Depth: 15
  • Hull Breadth: 32
  • Gross Tonnage: 192
  • Net Tonnage: 130
  • Owner:
    FOSS MARITIME COMPANY
    660 WEST EWING STREET
    SEATTLE, WA 98119-1587
  • Previous Vessel Names:
    Mamo II
  • Previous Vessel Owners:
    Dillingham Tug & Barge, FOSS MARITIME COMPANY