Built in 1959, by the Equitable Equipment Company, Madisonville, Louisiana (hull #1963) as the Lainoloc for the Bronx Towing Line of New York, New York.
In 1977, the tug was acquired by Weeks Marine Incorporated of of Cranford, New Jersey. Where she was renamed as the William J. McPhillips
In 1994, she was acquired by Hartley Marine Services Incorporated of East Boothbay, Maine. Where the tug was renamed as the Penobscot.
In 2013, Hartley Marine Services Incorporated was acquired by Winslow Marine Incorporated of Southport, Maine. Where the tug retained her name.
In 2014, the tug was acquired by foreign interests. Where she retained her name, although she is no longer listed in documentation. Her current, and or final disposition is unknown.
She was powered by a single, Alco 16-251E diesel engine. With a Western 270MRB reduction gear, at a ratio of 4.2:1. Turning a single, 108(in) by 68(in) stainless steel, fixed pitch propeller. For a rated 3,000 horsepower.
Her electrical service was provided by one, 60kW Delco generator set. Driven by a single, 6-71 diesel engine. And, a 40kW generator set. Driven by a single 4-71 diesel engine. The tug's capacities 62,000 gallons of fuel, 14,000 gallons of ballast, 4,872 of potable water, and 600 gallons of lube oil.
Her towing gear consisted of a 25 horsepower, electric over hydraulic, towing winch. Outfitted 1,800(ft) 1.75(in) towing wire. And, a 24(in) Webster Brickly capstan mounted on her bow.
(Captain Christopher Roehrig, Paul Strubeck)