Built in 1965, by Nichols Boat Works at Hood River, Oregon as the Julius Brusco for the Brusco Towboat Company of Longview, Washington.
In 1978, the Brusco Towboat Company was acquired by the Knappton Towboat Company of Astoria, Oregon. Where the tug retained her name.
The tug was later acquired by Sea Coast Transportation Incorporated of Seattle, Washington. Where she was renamed as the Glacier.
In 2001, she was acquired by the Island Tug and Barge Company of Seattle, Washington. Where the tug was renamed as the Island Mist.
In 2015, the tug was acquired by the Lakeshore Construction Company of Mukilteo, Washington. Where she was renamed as the Sea King.
She is a single screw tug, rated at 1,110 horsepower.