Built in 1982, by the Tacoma Boatbuilding Company Incorporated of Tacoma, Washington (hull #438) as the Andrew Foss for the Foss Maritime Company of Seattle, Washington.
Powered by two, sixteen cylinder, EMD 16-645-E6 diesel engines. With Voith AD 45-FH reduction gears, at a ratio of 15:1. Turning two, five bladed Voith Cycloidal drives. For a rated 4,290 horsepower.
Her electrical service is provided by two, 75kW generator sets. Driven by two, GM Detroit Diesel 6-71 diesel engines. With a hydraulic pump off of a PTO. The tug's capacities are 50,550 gallons of fuel, 2,100 gallons of hydraulic oil, 2,400 gallons of lube oil, and 5,400 gallons of water.
The towing gear consists of a Intercon HSW-40 winch, with a capstan mounted on the starboard side. Outfitted with 150(ft) of 5(in) plasma line. An INTERcon SD-200, single drum, towing winch. Outfitted with 305(ft) of 8(in), 12X12, plasma line, with a 7(ft) eye.