Built in 1968, by McDermott Shipyard of Morgan City, Louisiana (hull #150) as the Sea Flyer for Crowley Marine Services Incorporated of San Francisco, California.
She was the second Sea Swift class tug constructed by McDermott Shipyards for Crowley Marine Services Incorporated.
In 2008, the tug was acquired by Orinda International Incorporated of Panama City, Panama. Where she was renamed as the Admiral S.
She was powered by two, sixteen cylinder, EMD 16-645-E-7 diesel engines. Turning two, cast steel, fixed pitch propellers. Turning two, cast steel, fixed pitch propellers. She was a twin screw tug, rated at 5,750 horsepower.
Her electrical service was provided by two, 90kW generator sets. The tug's capacities were 165,000 gallons of fuel.
The towing equipment consisted of a Markey TDSD-36, double-drum, towing winch. Outfitted with 2,200(ft) of 2.25(in) towing wire.