Built in 1997, by Moss Point Marine Incorporated of Lockport, Louisiana (hull #133) as the Teresa for Penn Maritime Incorporated of Stamford, Connecticut.
In 2012, Penn Maritime Incorporated was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
In 2021, the unit was acquired by Unico Commodities of Houston, Texas. Where the unit retained their names.
In 2021, the unit was reflagged under a Liberian Flag.
Powered by two, sixteen cylinder, EMD 16-645F7 diesel engines. Turning two, stainless steel, fixed pitch propellers. She is a twin screw tug, rated 7,010 horsepower.
Her electrical service is provided by two 99kW generator sets. With a third, 99kW, auxillary, generator set. The tug's capacities are 148,993 gallons of fuel, 64,458 gallons of ballast, and 8,453 gallons of water.
Outfitted with an INTERcon coupler system. The Teresa is "married" with the 430(ft), by 76(ft) by 36(ft), double hulled, 115,000(bbl) barge, the Acadia. That was constructed simultaneously in 1997, by Gretna Machine and Iron Works of Harvey, Louisiana for Penn Maritime Incorporated.