Built in 1944, by Sagstad Shipyard Incorporated of Seattle, Washington as the LT-188 for the United States Army.
The tug was launched in September of 1943 and delivered to the United States Army Quartermaster Corps in January of 1944 as the LT-188.
In 1948, the tug was acquired by Island Tug and Barge Limited of Vancouver, British Columbia. Where the tug was renamed as the Island Navigator.
In 1960, Island Tug and Barge was acquired by McAllister Towing of New York, New York. Where the company became a subsidy of McAllister Towing Limited Montreal of Montreal. Where the tug retained her name.
In 1969, Island Tug and Barge Limited was acquired by Genstar Limited of Vancouver, British Columbia. Where the tug initially retained her name.
The tug was sold and renamed as the Isla.
She was later sold and renamed as the Pablo.
The tug was reportedly sold to interests in Hong Kong. Her current and or final disposition is unknown. She was a twin screw tug, rated at 1,380 horsepower.