Built in 1963, by Star Shipyards of New Westminster, British Columbia as the Island Rocket 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 initially retained her name.
In 1973, Genstar Limited became Seaspan Marine Incorporated of Vancouver, British Columbia. Where the tug was renamed as the Seaspan Rocket.
She was a single screw tug, rated at 450 horsepower.