Built in 1976, by the Bourg Drydock and Services Company of Bourg, Louisiana as the Harvey Ruler for Harvey Gulf Marine Incorporated of New Orleans, Louisiana.
In 2010, the tug was acquired by the Crosby Marine Transportation Company of Golden Meadow, Louisiana. Where she was renamed as the Crosby Trinity.
Powered by two, Caterpillar 3512 DITA diesel engines. Turning two, cast steel, fixed pitch propellers. She is a twin screw tug, rated at 6,000 horsepower.
Her electrical service is provided by two, 99kW Isuzu generator sets. The tug's capacities are 62,000 gallons of fuel oil, and 4,100 gallons of potable water.
The towing gear consists of a single drum, Smatco Model 55 DADT 170 towing winch. Outfitted with 2,200(ft) of 1.75(in) towing wire.