Built in 1966, at Vancouver, British Columbia as the Island Boomer II for Island Tug and Barge Limited of Vancouver, British Columbia. A subsidy of McAllister Towing Limited Montreal of Montreal.

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. Where the tug was renamed as the Island Boomer III.

She was a single screw tug, rated at 105 horsepower.