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Tugboats (AT)


Photograph of Navajo-class fleet tugboat

Mare Island Navy Yard #4455-43

Tugboats are usually yard craft whose function is to guide large ships along the channel and to or from berths.  They are particularly vital in crowded or poorly developed harbors.  Oceangoing tugboats tow disabled ships to harbor or tow barges or floating dry docks from point to point.  Tugs may be unglamorous, but they are essential to the efficient operation of a fleet of ships.

The U.S. Navy redesignated older tugboats as ATO and newer oceangoing tugboats as ATF. We make no distinction in the list below.

U.S. tugboats

Abnaki class
Allegheny class

Navajo class

Sonoma class



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