Built in 1977, by Campbell Industries Incorporated of San Diego, California (hull #115) as the Independence Service for Zapata Marine Service Incorporated of Houston, Texas.
In 1985, Zapata Marine Service, Gulf Fleet Marine Incorporated, and Jackson Marine Services merged to form Zapata Gulf Marine Service Incorporated of Houston, Texas.
In 1991, she was acquired by the Donjon Marine Company Incorporated of Hillside, New Jersey. Where she was converted for use as a towing vessel. And, was renamed as the Atlantic Salvor.
In 1998, the vessel was acquired by Seabulk Offshore LLC of Fort Lauderdale, Florida, where she was renamed as the Seabulk Nevada.
In 2008, she was acquired by Cook Inlet Spill Prevention and Response Incorporated of Kenai, Alaska. Where the vessel was renamed as the Perseverance.
Powered by two, EMD 16-645-E5 diesel engines. With Falk MPRF 5:1 reduction gears. Turning two, stainless steel, fixed pitch propellers. She was a twin screw towing vessel rated at 5,750 horsepower.
Her electrical service was provided by two, 200kW generator sets. The vessels capacities were 115,800 gallons of fuel oil, 4,800 gallons of lube oil, and 41,100 gallons of potable water.
The towing equipment consisted of a double drum, Fitz Culver, FCSL, towing winch. Outfitted with two 6,500(ft) of 3(in) towing cable on each drum.
(Kyle Stubbs, Captain Eric Takakjian)