Built in 1968, by the Dravo Corporation of Pittsburgh, Pennsylvania (hull #5149) as the Grace McAllister for the McAllister Brothers Towing Company of New York, New York.
In 2018, the tug was "laid up" at McAllister Towing and Transportation's yard in Charleston, South Carolina.
Powered by a single, EMD 16-645-E5 diesel engine. With a Falk reduction gear, at a ratio of 5.741:1. She is a single screw tug, fitted with a kort nozzle and a flanking rudder. For a rated 3,200 horsepower.
Her capacities are 61,643 gallons of fuel oil, 489 gallons of lube oil, and 4,884 gallons of potable water. She is outfitted with three fire stations, rated at 500 Gallons Per Minute, and one fire monitor.