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Z-DRIVE

February 8, 2010

Washburn & Doughty offers new Z-drive tug design

Shipbuilder Washburn & Doughty Associates, Inc. of East Boothbay, Maine has unveiled a new 80 ft x 33 ft 9 in Z-drive tug design.

Designed for ship handling and harbor work, the tug admeasures less than 150 gross tons and has a Load Line length of less than 79 ft allowing it to operate without a load line assignment. It is designed to exceed ABS standards and customers can choose to specify ABS class.

The vessel has been designed by Washburn & Doughty's Executive VP and Naval Architect, Bruce Washburn and draws on his knowledge gained as lead architect of 62 vessels designed and built by the shipyard. These include 21 92 ft Z-drive tugs and three 98 ft Z-drive tugs providing towing and escort services between Boston, Massachusetts and Port Arthur, Texas.

Clean underwater lines and two aft Z-drives give the vessel the maneuverability necessary to be a truly versatile harbor tug.

Design features include a wide beam to enhance indirect capabilities and stability. A broad bow will evenly distribute the "point-of-contact" load between the tug and the ship.

Because the tug is an in-house design, customers have the flexibility to easily modify the vessel to suit their particular requirements.

The vessel is adaptable to any high speed main engines delivering 4,000-5,000 horsepower with matching Z-drive units. The tug has straight line carbon fiber shafts. Customers can specify off-ship fire-fighting, a stern capstan and/or a bow winch.

The vessel can be arranged as a day boat or outfitted for round the clock operations with up to four staterooms for eight crew members.

For 24/7 service, the design features a full galley, dining area and head with shower.

Washburn & Doughty operates from a new, state-of-the-art construction building. This spacious facility features a layout that maximizes efficiency and it is outfitted with modern shipbuilding tools and equipment. The building measures 42,000 sq. ft. and is designed for vessels up to 200 ft long by 50 ft wide. It features two construction bays, each equipped with two 20-ton cranes. A central mezzanine contains shop space--served by a 5-ton crane--and offices for production support, supervision, design and engineering.


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