Built in 2017, by Diversified Marine Incorporated of Portland, Oregon (hull #35) as the Dr. Hank Kaplan for Tug Construction LLC. of Seattle, Washington.
In 2017, the tug was chartered to Harley Marine Services Incorporated of Seattle, Washington. Where the tug retained her name.
In 2019, she was returned to Tug Construction LLC. of Seattle, Washington. Where she was chartered to AmNAV Maritime Services of Oakland, California. A subsidiary of the Foss Maritime Company of Seattle, Washington. Where the tug retained her name.
In 2021, the tug was chartered by Cook Inlet Tug and Barge Company of Anchorage, Alaska. A subsidy of Foss Marine Holdings of Seattle, Washington. Where the tug retained her name.
Powered by two, Tier III compliant, Caterpillar 3516 diesel engines. With Caterpillar MTA-24 z-drives. Equipped with two, four bladed, Nibral, skewed 2,400(mm)/94(in) propellers. She is a twin screw tractor tug, rated at 5,300 horsepower.
Her electrical service is provided by two, Tier III complaint Caterpillar C7.1 generator sets. The tug's capacities will be 30,000 gallons of fuel, 2,800 gallons of fresh water, and 370 gallons of lube oil.
The deck equipment consists of a Markey DEPC-46 towing winch, mounted on the bow. Outfitted with 600(ft) of 8(in) spectra line. And a Markey DEPC-32 towing winch, mounted on the stern. Outfitted with 250(ft) of 6(in) spectra line.