Built in 1970, by the Marinette Marine Corporation of Marinette, Wisconsin (hull #YTB 792) as the YTB 792 (Antigo) for the United States Navy.
Her keel was laid down on the 27th of September 1966, she was launched on the 18th of April 1967 and she was delivered to the Navy on July 10th 1967.
The tug was placed in service and allocated to the 6th Naval District and based at Charleston, South Carolina. The date she was removed from service is unknown. The tug was struck from the Naval Register on June 26th 1999 and was sold by GSA for commercial service, on May 17th, 2000.
She was acquired by McAllister Towing and Transportation, of New York, New York. Where she was renamed as the Donal G. McAllister.
In 2002, she was repowered/reconfigured. Her Fairbanks Morse 10 cylinder diesel main engine, that turned a single propeller, and was rated at 2,000 horsepower was removed and replaced with a single EMD 16-645-E5 Turbo diesel engine that drove a single 1515 Schottel, variable pitch "z-drive" producing 39 tons of Bollard pull and a rated 3,000 horsepower. Her original underwater Submarine fendering was kept but was refurbished.
The tug has a capacity of 22,900 gallons of fuel oil, 710 gallons of lube oil and 1,240 gallons of potable water.
She is outfitted a 6-71 with Goulds pump producing 2,000 Gallons Per Minute married with two fire monitors rated for a 1,500 gallon foam capacity.
Her deck gear consists of a JonRie InterTech Series 200 bow winch equipped with 450(ft) of 7(in) Neutron rope.