Built in 2015 by Diversified Marine Incorporated of Portland, Oregon (hull #31) as the Sarah for the Brusco Tug and Barge Company of Longview, Washington.
Designed by naval architecture firm Robert Allan Limited of Vancouver, British Columbia for the Brusco Tug and Barge Company of Longview, Washington.
In 2017, the tug was chartered AmNAV Maritime Services of Oakland, California. A subsidiary of the Foss Maritime Company of Seattle, Washington. Where the tug retained her name.
Powered by two, Caterpillar 3512C diesel engines. With Rolls-Royce z drives, outfitted with 94.5(in), fixed pitch propellers. For a rated 4,732 horsepower.
(Kyle Stubbs, Isaac Pennock)