Built in 1971, by McDermott Shipyards Incorporated of Morgan City, Louisiana (hull #169) as the Elmire G. Defelice for the DeFelice Marine Towing Company of Lake Charles, Louisiana.
In 1980, the DeFelice Marine Towing Company was acquired by Gulf fleet Marine Incorporated of Houston, Texas. Where the tug retained her name.
In 1985, Zapata Marine Service, Gulf Fleet Marine Incorporated, and Jackson Marine Services merged to form Zapata Gulf Marine Service Incorporated of Houston, Texas. Where the tug retained her name.
In 1987, the tug chartered to the Boston Barge and Tugboat Company of Boston, Massachusetts. Where she was renamed as as the Chelsea.
In 1991, the tug was acquired by the Dann Ocean Towing Company of Tampa, Florida. Where and was renamed as the Alice H.
In 1998, the Dann Ocean Towing Company renamed the tug as the Shannon Dann.
In 2005, she was chartered to the Constellation Maritime Company of Manchester, Massachusetts. Where the tug was renamed the Shannon.
In 2006, the tug was returned to the Dann Ocean Towing Company of Tampa, Florida. Where she was renamed as the Shannon Dann.
Powered by two, EMD 8-645-E2 diesel engines. With Reintjes WAV 1651 reduction gears, at a ratio of 4.00:1.00. Turning two, 90(in) by 76(in), fixed pitch, four bladed, stainless steel propellers. Dor a rated 2,400 horsepower.
Her electrical service is provided by two, 75kW generator sets. Driven by two, Detroit Diesel 6-71 diesel engines. The tug's capacities are 61,188 gallons of fuel, 800 gallons of hydraulic oil, 2,370 gallons of lube oil, 5,000 gallons of wash water, and 4,000 gallons of potable water.
Her towing gear consists of a double drum, Markey, TDSD-28, towing winch. Outfitted with 2,000(ft) of 1.75(in) towing wire on the primary drum. And 2,000(ft) of 1.75(ft) of towing wire on the secondary drum.
(Captain Eric Takakjian, Nate Lopez)