Built in 1983, by the Western Towboat Company Incorporated of Seattle, Washington (hull #1) as the Western Mariner for the Western Towboat Company of Seattle, Washington.
She was the first tug to be constructed by the Western Towboat Company. And, the first Mariner class tug built by the Western Towboat Company. The tug's hull is constructed of steel, with the pilot house, and superstructure constructed of aluminum.
Powered by two, Caterpillar 3516 diesel engines. With Twin Disc reduction gears, at a ratio of 6:1. Turning two, 96(in) by 86(in) stainless steel, fixed pitch propellers. She is twin screw tug, rated at 3,000 horsepower.
Her electrical service is provided by two generator sets. One, 50kW generator set, driven by a GM 471 diesel engine. And, a 50kW generator set, driven by a GM 671 diesel engine. The tug's capacities are 50,000 gallons of fuel, and 500 gallons of lube oil.
The towing gear consists of a single drum, Nordic towing winch. Outfiited with 2,800(ft) of 2(in) towing wire.