Built in 2009, by Bay Shipbuilding of Sturgeon Bay, Wisconsin (hull #0820) as the Dublin Sea for K-Sea Transportation Partnership of East Brunswick, New Jersey. Her construction was originally contracted by Sirius Maritime for a long term charter under the Tesoro Company.
However, in 2007 Sirius Maritime was acquired by K-Sea Transportation Partnership, LP. of East Brunswick, New Jersey. K-Sea opted to continue the construction of the unit.
In 2011, In 2011, K-Sea Transportation was acquired by the Kirby Corporation of Channelview, Texas, where the tug retained her name.
Powered by two GE 16V-250 four stroke diesel engines with Reintjes WWAF 5655 reduction gears at a ratio of 5.5:1, vertical offset. Turning two Bird Johnson new generation five bladed fixed pitch propellers with internal shaft brakes for a rated 9,740 horsepower.
Her electrical service is provided by one Caterpillar C-9 generator rated at 215 kW and a second Caterpillar C-9 generator rated at 163 kW. The tug is SOLAS classed, her capacities are 144,000 gallons of diesel fuel, 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" that 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 to a 543(ft), 150,000 bbl double hulled barge the DBL 185, which was built simultaneously by Bay Shipbuilding of Manitowic, Wisconsin.