Built in 1980, by Main Iron Works Incorporated of Houma, Louisiana (hull #356) as the Pacific Queen for the Pacific Towboat and Salvage Company of Long Beach, California, a subsidiary of the Dillingham Corporation of Honolulu, Hawaii.
In 1986, as part of a restructuring, the Pacific Towboat and Salvage Company, along with all other Dillingham maritime transportation operations, was transferred to the management of the Foss Maritime Company of Seattle, Washington.
In 1992, the tug was transferred to the Foss Maritime Company of Seattle, Washington. Where she retained her name.
In 2021, she was acquired by Dawn Marine Services Incorporated of Gretna, Louisiana. Where the tug was renamed as the Caspian Dawn.
Powered by two, CaterpillarD-398 diesel engines. With Caterpillar 7261 reduction gears, at a ratio of 4.61:1. Turning two, four bladed, 76(in) by 76(in), Coolidge, fixed pitch propellers. She is a twin screw tug, fitted with flanking rudders. For a rated at 2,379 horsepower.
Her electrical service is provided by two, 50kW generator sets. Driven by two, Detroit Diesel 4-71 diesel engines. The tug's capacities are 21,189 gallons of fuel, 384 gallons of lube oil, 453 gallons of hydraulic oil, and 3,900 gallons of potable water.
The towing equipment consists of an INTERcon SD-150, single drum, towing winch. Outfitted with 2,000(ft) of 1.5(in) towing wire. And, a Foss bow winch, outfitted with 9(in) Samson line.