Arapaho class fleet tug
Encyclopedia
Arapaho-class fleet tugs were ocean going tugboat
Tugboat
A tugboat is a boat that maneuvers vessels by pushing or towing them. Tugs move vessels that either should not move themselves, such as ships in a crowded harbor or a narrow canal,or those that cannot move by themselves, such as barges, disabled ships, or oil platforms. Tugboats are powerful for...
s placed in service with the US Navy in the early half of the 20th century.