J.M. Martinac To Build 2,560-Bhp Z-Drive Ship-Berthing Tug

Hawaiian Tug & Barge Corporation have ordered delivery of a 2,560-bhp ship-berthing tug from J.M. Martinac Shipbuilding Corporation of Tacoma, Wash. The new tug, designed by Robert Allan Ltd.

of Vancouver, B.C., Canada, is scheduled for completion in September 1989, and will be put into service docking ships in the Port of Honolulu.

The vessel is modeled on Robert Allan Ltd.'s highly successful series of tug designs for C.H. Cates & Sons Ltd., operating in Vancouver.

The tug will be powered by a pair of CAT 3512 TA marine diesels, each rated 1,280 bhp at 1,600 rpm.

Each engine drives a Niigata model ZP-2A azimuthing drive, through a reduction gear and Gieslinger torsional coupling.

The new tug, like her predecessor Charles H. Cates No. 1, has a unique electric control system. Electric power is provided by two 75-kw diesel generators. Utilizing Mechtronics 5900 series frequency modulating motor drives, fully variable speed control of the steering motors and winch drive motor from the AC power generations units is achieved.

Another feature is the adoption of an articulated line-handling crane.

An Atlas AK 4003 CV-14 hydraulic knuckle-boom crane is located on the foredeck utilized to pass the tug's own line up to the decks of attended vessels. The crane is controllable from deck or from the wheelhouse. The 3-inch diameter Nystron braid line is stowed aboard a specially designed winch by Burrard Iron Works Ltd., incorporating an under-slung spooling gear and line protection pan. The winch is electrically driven, and is also controllable from deck or from the wheelhouse.

The vessel is designed to be operated by a crew of two, with a fully automated engine room.

Robert Allan Ltd. is one of western Canada's most experienced firms of consulting naval architects, operating continuously in Vancouver since 1930. The firm has established a reputation for innovative designs in all fields of tug and barge design, and from a 20-year close association with the firm of C.H.

Cates & Sons Ltd. have developed designs for a range of highly efficient and cost-effective ship-assist tugs.

For a free brochure illustrating the range of ship-assist tug designs by Robert Allan Ltd., Circle 35 on Reader Service Card

Maritime Reporter Magazine, page 47, May 1989

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Maritime Reporter

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