Built in 1973, by Main Iron Works of Houma, Louisiana as the Maggie Swann .
The tug was later acquired by Dann Marine Towing of Chesapeake City, Maryland where she was renamed as the Emerald Coast .
She is a square bow, twin screw pushboat. Powered by two Caterpillar 3508 main engines with two ZF Gears BW361 reduction gears at a ratio of 6.16:1. Turning two four bladed stainless steel 64(in) diameter by 58(in) pitch fixed pitch propellers for a rated 1,700 horsepower.
Her electrical service is provided by two Detroit Diesel 3-71s driving a Delco 40kw generator on the port side, and a Magna 40kw generator on the starboard side. Her capacities are 22,520 gallons of fuel oil, 644 gallons of lube oil, 400 gallons of waste oil, 11,066 gallons of water.
Her towing gear consists of two bow mounted Nabrico 40 ton Manual winches outfitted with 1 1/8(in) wire. She also carries 600(ft) of 6(in) three strand Nylon Hawser.