Built in 1964, at Mare Island, California as the Paul Bunyan
The tug was later acquired by Island Tug and Barge Limited of Vancouver, British Columbia. A subsidy of McAllister Towing Limited Montreal of Montreal. Where she was renamed as the Island Booster.
In 1969, Island Tug and Barge Limited was acquired by Genstar Limited of Vancouver, British Columbia. Where the tug retained her name.
In 1971, Genstar Limited partnered with the Dillingham Corporation to merge Island Tug and Barge with the Vancouver Tug Boat Company, creating Seaspan Marine Incorporated of Vancouver, British Columbia
The tug is no longer listed in documentation. Her current, and, or final disposition is unknown.