Built in 2004, by the Eastern Shipbuilding Group of Panama City, Florida (hull #816) as the Shannon McAllister for the McAllister Towing and Transportation Company of New York, New York.
In 2006, the tug was chartered to the Suderman and Young Towing Company of Houston, Texas. Where she was renamed as the Shannon.
In 2011, she was acquired by Suderman and Young Towing Company of Houston, Texas. Where she was renamed as the Denia.
Along with the Bay Houston Towing Company of Houston, Texas. The Suderman and Young Towing Company is part of a combined operating company, the G and H Towing Company of Houston, Texas.
In 2011, the G and H Towing Company became part of a joint venture between the Moran Towing Corporation of New Canaan, Connecticut. Serving the Cameron LNG facility near Lake Charles, Louisiana.
Powered by two, Tier II compliant, EMD 12-710-G7B diesel engines, with Schottel SRP 1515 z-drives. For a rated 6,000 horsepower.
Her electrical service is provided by two, 99 kW, Marathon generator sets. The tug's capacities are 30,000 gallons of fuel oil, 500 gallons of lube oil and 6,150 gallons of potable water. With a capacity for 3,000 gallons of AFFF Foam for firefighting purposes.
The towing gear consists of a Jon Rie 250 escort winch, mounted on her bow. Outfitted with 450(ft) of 9(in) Quantam 8 Synthetic Rope.