The newest tractor tug to come out of MARCO Shipyard Seattle is the 105-ft. Millennium Dawn, the third boat in its class designed and built for Harley Marine Services of Seattle, and the twelfth tractor tug from MARCO. It will join her sister ships operating in Long Beach, Calif., part of Harley’s West Coast and Alaska operations that in clued Olympic Tug & Barge, Millenium maritime, Pacific Coast Maritime
, Public Service marine
and Westoil Marine Services.
Like her predecessors, the new tug is a powerful, multipurpose vessel, capable of providing ship assist, inland and ocean towing, and escort services. Her rugged design has evolved from MARCO’s first tractor tug, the Gyrfalcon, operated by Pacific Coast Maritime. It has been in service in the demanding environment of Dutch Harbor, Alaska since
her deliver in 1995.
The latest addition to Harley’s growing fleet achieved a maximum bollard pull of 130,500 pounds and a maximum speed of 13.5 knots during pre-delivery sea trials. At 105 ft. (32m) long, with a beam overall of 36 ft. 10 in. (11.2 m) and a molded depth of 16ft. 6 in. (5 m), it is powered by a pair of Caterpillar 3516B diesels providing a total of 4,400 BHP that drive Ulstein Model 1650H Z-drive units, each fitted with a 94.5in. (240 cm), four-bladed prop set in a nozzle. Auxiliary power comes from two CAT 3304BT diesels, both driving 105-kW generators and hydraulic PTOs. Keel coolers are from Duramax.
Winches for the Millenium Dawn are from Burrard Iron Works of British columbia. The Model HF headline winch features a slack-rendering mode, and carries 600ft. (183m) of 8 in. (20.3cm) circumference synthetic line. The Model HJD double-drum tow winch handles 2,600 ft. (792m) or 2.25 in. (5.7 cm.) diameter wire and 1,000 ft. (305 m) of 2 in. (5cm) diameter wire. The hydraulic tow pins/stern roller unit is from Smith Berger Marine of Seattle.
Other equipment includes switchboards, distribution panels and wiring by Harris Electric; master alarm panel by Marine Controls; and electronics furnished by Radio-Holland U.S.A. Electronics and navigational aids include Stephens VHF and ICOM SSB radios; JRC radars; Furuno GPS units and plotter; an Anschutz gyrocompass; and a Robertson autopilot. Loadline consulting and certification was provided by American Bureau of Shipping.