Built in 2009, by the Marinette Marine Corporation of Sturgeon Bay, Wisconsin (hull #820) as the Dublin Sea for K-Sea Transportation Partnership Incorporated of East Brunswick, New Jersey.
Her construction was originally contracted by the Sirius Maritime Company of Seattle, Washington. With the intention of servicing a long term charter to Tesoro Company of San Antonio, Texas.
In 2007, the Sirius Maritime Company was acquired by the K-Sea Transportation Partnership Incorporated of East Brunswick, New Jersey. Where K-Sea Transportation opted to continue the construction of the unit.
In 2011, the K-Sea Transportation Partnership Incorporated was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
Powered by two, sixteen cylinder, GE 16V-250, diesel engines. With Reintjes WWAF 5655 reduction gears, at a ratio of 5.5:1. Turning two, Bird Johnson, new generation, five bladed, fixed pitch propellers, with internal shaft brakes. She is a twin screw tug, rated at 9,740 horsepower.
Her electrical service is provided by two, 215kW, Caterpillar C-9 generator sets. And, a third, 163kW Caterpillar C-9 generator set. The tug's capacities are 144,000 gallons of fuel, 5,547 gallons of lube oil, 153,220 gallons of ballast, and 19,000 gallons of potable water.
She is fitted with an INTERcon coupler system featuring a 50(in) diameter pin. The system includes a "lightering system." This system allows for continuous adjustment of the tug's height between the tug and the barge, as the draft of the barge changes during loading and unloading procedures.
The Dublin Sea is "married" with a 543(ft), 150,000(bbl), double hulled, barge. The DBL-185, which was constructed simultaneously in 2009. By the Bay Shipbuilding Group of Manitowoc, Wisconsin for the K-Sea Transportation Partnership of East Brunswick, New Jersey.