Built in 2008, by Thoma-Sea Boat Builders of Lockport, Louisiana (hull #108) as the Coho for Penn Maritime of Stamford, Connecticut.
She was the second of five identical FIN Class units designed for Penn Maritime by Frank Basile of Entech Associates of Houma, Louisiana.
She is fitted with a JAK 400 coupler system, and married to a 414(ft) 90,000 bbl double hulled barge the Penn No. 92. Which was built in 2008 by Corn Island Shipyard of Lamar, Louisiana.
Her raised aluminum tower and wheelhouse features a eye level of 51(ft). The wheelhouse also features include two sets of engine gauges and multiple sets of EMI engine controls, with overhead chart and data displays. With RexRoth steering controls, and Furuno radars and radios. As well as equipped with a full set of aft controls.
On her stern, she is fitted with an "H" bitt, built by Thoma Sea, and a capstan, manufactured by JonRie InterTech, of New Jersey. She is also rigged for emergency towing; on the stern is a towing hawser and chain rigged to the "H" bitt in the case of an emergency.
She is powered by a pair of 2,000 horsepower, 60 liter, V-16 Cummins QSK-60 engines turning Reintjes gears that are shafted to 104(in) with skewed propellers mounted in NautiCan nozzles with shutter rudders turning up to 1,800 rpm for a rated 4,000 horsepower.
Her electrical power is provided by three 99-kW John Deere generator sets.
In 2012, Penn Maritime was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.