Built in 1968, by Dravo Corporation of Pittsburgh, Pennsylvania (hull #5149) as the Grace McAllister for McAllister Towing of New York, New York.
Powered by a single EMD 16-645-E5 diesel engine. With a Falk reduction gear at a ratio of 5.741:1 for a rated 3,200 horsepower. She is a single screw tug, fitted with a kort nozzle and a flanking rudder.
Her capacities are 61,643 gallons of fuel oil, 489 gallons of lube oil, and 4,884 gallons of potable water.
She is ABS an certified tug, outfitted with three fire stations rated at 500 Gallons Per Minute and one fire monitor.
Her towing gear consists of a hawser winch equipped with 1,200(ft) of 9(in) towing hawser.