Built in 1969, by Mangone Shipbuilding of Houston, Texas (hull #88) as the Spartan for Crowley Marine Services Incorporated of San Francisco, California.
She was the fourth Jupiter class tug constructed for Crowley Marine Services Incoprorated by the Mangone Shipbuilding Company.
In 2014, the tug was acquired by the Brusco Tug and Barge Company of Longview, Washington. Where she retained her name.
Originally powered by two, Caterpillar D-398-B diesel engines. With Lufkin reduction gears, at a ratio of 5.932:1. Turning two, five bladed, stainless steel, fixed pitch propellers. For a rated 2,000 horsepower.
In 1994, the tug was repowered with two, Caterpillar 3512 diesel engines. With Lufkin reduction gears, at a ratio of 5.932:1. Turning two, five bladed, stainless steel, fixed pitch propellers. For a rated at 3,500 horsepower.
The tug's towing equipment consists of a Skagit RB-90, double drum, "waterfall" towing winch. Outfitted with 1,600(ft) of 1.75(in) towing wire, on each drum.
(Daniel Porter, Kyle Stubbs)