Built in 1965, by Main Iron Works of Houma, Louisiana (hull #148) as the Matthew C. for Caldwell Marine International of Farmingdale, New Jersey.
In 1996, the tug was acquired by Cable Ventures Incorporated of Toms River, New Jersey. Where the tug was renamed Johnny C.
In 2006, she was acquired by Mohawk Northeast Incorporated of Plantsville, Connecticut. Where the tug was renamed as the Judy M.
In 2008, Mohawk Northeast Incorporated acquired the Whaling City Dredge and Dock Company of Groton, Connecticut.
Powered by two Tier II compliant Cummins QSK19 diesel engines. With ZF2400 reduction gears, at a ratio of 5.96:1. Turning two, fixed pitch, stainless steel, propellers. For a rated 1,200 horsepower.
Her electrical service is provided by one 30kW Kubota V3300 generator set. And, another 33kW Northern Lights M-33 generator set. The tug's capacities are 13,250 gallons of fuel, 250 gallons of lube oil, 55 gallons of hydraulic oil, and 1,600 gallons of potable water.
The tug's towing gear consists of a single drum, mechanical towing winch. Outfitted with 1,800(ft) of 1.5(in) towing wire. Driven by a single Detroit Diesel 4-71 diesel engine. With an 18(in) hydraulic capstan. With two 40 ton mechanical, deck winches. Outfitted 100(ft) 7/8(in) wire.