Built in 1978, by Houma Shipbuilding Incorporated of Houma, Louisiana (hull #67) as the Mitchell Hebert for Petchem Tugs Incorporated of Wilmington, North Carolina.
In 2012, the tug was acquired by Miller Marine Services Incorporated of Port Jefferson, New York. Where the tug was renamed as the Debora Miller.
In 2016, she was acquired by Seward Marine Services of Chesapeake, Virginia. Where the tug was renamed as the Robert T.
Powered by two, Detroit Diesel 16V149 diesel engines. With Twin Disc MG-540 reduction gears, at a ratio of 6.18:1. Turning two, 72(in) by 56(in) pitch, stainless steel, fixed pitch, propellers. For a rated 2,060 horsepower.
The tug's capacities are 27,386 gallons of fuel, 100 gallons of lube oil, and 2,000 gallons of water. The towing equipment consists of a single drum, 13(in), electric powered, rope winding drum. Driven by a single, Detroit Diesel 471 diesel engine.