Built in 1982, by McDermott Shipyard of Amelia, Louisiana (hull #267) as the El Gallo Grande for Twenty Grand Offshore, a Tidewater Marine subsidiary of New Orleans, Louisiana.
The tug was later acquired by Roehrig Maritime of Staten Island, New York where she was renamed as the Eileen M. Roehrig, named for Roehrig Maritime's founder Christopher Roehrig's wife. Roehrig Maritime was the second owner of the boat.
In 2007, Roehrig Maritime was acquired by K-Sea Transportation Partnership of East Brunswick, New Jersey where the tug was renamed as the North Sea.
In 2011, K-Sea Transportation was acquired by the Kirby Corporation of Channelview, Texas, where the tug retained her name.
Powered by a pair of 16-645 e-2 diesel engines, she is a twin screw tug rated at 4,200 horsepower.