Built in 1976, by McDermott Shipyard Incorporated of Morgan City, Louisiana (hull #188) as the Robin VI for the Robin International Towing Company of Harvey, Louisiana.
In 1983, the tug was acquired by Crowley Marine Services Incorporated of San Francisco, California. Where she was renamed as the Sea King.
She was the second Sea Robin class tug for Crowley Marine Services.
In 2005, the tug was acquired by Northland Services Incorporated of Seattle, Washington. Where she was renamed as the James Haagen.
In 2005, she was acquired by the Dunlap Towing Company of LaConner, Washington. Where she was renamed as the Polar King.
Powered by two, Caterpillar 3606 diesel engines. With Lufkin RHS 2524 reduction gears, at a ratio of 3.97:1. Turning two, three bladed, 104(in) by 95(in), fixed pitch propellers, mounted in kort nozzles. For a rated 4,900 horsepower.
Her electrical service is provided by two, 75kW Delco generator sets. Driven by two, Detriot Diesel engines. The tug's capacities are 100,000 gallons of fuel oil, 2,052 gallons of lube oil, 1,026 gallons of hydraulic oil and 4,200 gallons of potable water.
The towing equipment consists of an INTERcon, double drum, towing winch. Outfitted with 2,400(ft) of 2.25(in) wire on the primary drum. And, 600(ft) of 9(in), nylon hawser, on the secondary drum.
(Captain Russell Shrewsbury, Captain Ric Shrewsbury, Captain Ron Greger, Kyle Stubbs)