Built in 2024, by Washburn and Doughty Associates of East Boothbay, Maine (hull #137) as the Isabel McAllister for the McAllister Towing and Transportation Company of New York, New York.

Powered by two, Tier IV compliant, sixteen cylinder, Caterpillar 3516E diesel engines. With Schottel SRP 490 FP z-drives. She is a twin screw tractor tug, rated at 6,770 horsepower.

Her electrical service is provided by two, Tier III compliant, 99kW, John Deere 4045 generator sets. The tug's capacities are 30,000 gallons of fuel, 4000 gallons of potable water, and 500 gallons of AFF firefighting foam.

The towing equipment consists of a 75 horsepower, Class II, Markey DEPCF-52 render / recover winch mounted on the bow. Outfitted with 800(ft) of 10(in) line. On the stern, she is outfitted with a Markey DEPC-42 hawser winch. Outfitted with 450(ft) of 2.25(in) amsteel blue line.