View of two Crowley Harbour Class Tractor Tugs moored in the port of Seattle

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Harbour Class Tractor Tugs provide escort and docking services for tankers, container ships and other vessels as they enter and depart from the Seattle harbor.

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Size: 5050px × 3360px
Location: SSA Marine cargo terminal, East Marginal Way South, Seattle, WA 98134
Photo credit: © John Gaffen / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: boats], class, crowley, cycloidal, docking, engineering, escort, harbour, marine, port, propulsion, seattle, tractor, tug, tugs