Built in 2009, by Thoma-Sea Boatbuilders of Houma, Louisiana (hull #143) as the Allison Crosby for Crosby Marine Transportation of Golden Meadow, Louisiana. Powered by two Caterpillar 3516 DITA SCAC “B” HD diesel engines, with two Reintjes reduction gears at a ratio of 4.5:1, turning two Bird Johnson 113(in) by 99(in) stainless steel propellers mounted in kort nozzles; for a rated 10,500 horsepower. Her electrical service is provided by two 75kW generators. The tug’s towing gear consists of a Markey TDSD 34 double drum towing winch, driven by a single GM 6-71 diesel engine, and outfitted with 2,400(ft)of 2.25(in) towing wire on the main drum, and 2,000(ft) 2(in) on the auxiliary drum.