Built in 1977, by Main Iron Works of Houma, Louisiana (hull #317) as the Eileen McAllister for the McAllister Brothers Towing Company of New York, New York.
Designed by Donald C. Hankin of McAllister Brothers Incorporated of New York, New York. The tug is named for Eileen McAllister Donovan, a great granddaughter of Captain James McAllister. Who founded McAllister in 1864.
Powered by two, sixteen cylinder, EMD 16-645-E6 diesel engines. With Falk reduction gears, at a ratio of 4.708:1. Turning two, cast steel, 114(in) by 112(in) fixed pitch, propellers. For a rated at 4,000 horsepower.
Her electrical service is provided by two, 99kW generator sets. The tug's capacities are 117,380 gallons of fuel oil, 1,400 gallons of lube oil and 1,788 gallons of potable water.
The tug's towing equipment consists of an HBL Industries, double drum, towing winch. Outfitted with 2,200(ft) of 2 1/4(in) towing wire. She is equipped with four fire fighting stations, rated at 250 Gallons Per Minute.