Built in 1985, by the Western Towboat Company Incorporated of Seattle, Washington (hull #3) as the Alaska Mariner for the Western Towboat Company of Seattle, Washington.
She was the third Mariner class tug built by the Western Towboat Company. The tug was a modified design from that of her predecessors. The tug's hull is constructed of steel, with the pilot house, and superstructure constructed of aluminum.
Powered by two, Caterpillar 3516-B diesel engines. With Lufkin RLS-8/1 reduction gears. Turning two, 104(in) by 120(in) stainless steel, fixed pitch propellers, mounted in Nautican kort nozzles. For a rated 4,000 horsepower.
Her electrical service is provided by two, 55kW Caterpillar 3304 generator sets. The tug's capacities are 120,000 gallons of fuel, and 1,150 gallons of lube oil.
The towing gear consists of a Nordic, single drum towing machine. Outfitted with 2,800(ft) of 2.25(in) towing wire. With an additional 850(ft) of 2.25(in) towing wire.
(Captain Ric Shrewsbury, Captain Russell Shrewsbury)