Page 52: of Maritime Reporter Magazine (December 1993)

Vancouver Shipyards Builds Pair Of

Tractor Tugs In Five Months

The ship-assist Z-drive tugs Seaspan Hawk and Seaspan Falcon.

In September 1993, Seaspan International Lti of North Vancouver, B.C. accepted delivery of tw new high performance, 3,000-bhp tugs to provic ship-assist services in the Port of Vancouver: th

Seaspan Hawk and the Seaspan Falcon, built h

Vancouver Shipyards Co. Ltd., of North Vancouve:

The 80-foot tugs were designed by Robert Alia

Ltd. of Vancouver, in collaboration with the owner technical staff and the shipyard engineering de partment. Robert Allan Ltd. provided numericall lofted lines, and complete NC definition of all strut tural parts, which greatly facilitated the rapid con struction program. The tugs are configured as "da; boats," for operation with a crew of two. Th machinery spaces comply with all Canadian Coas

Guard requirements for Unmanned Machiner;

Spaces.

The tugs are of the "reverse-tractor" configura tion with azimuthing Z-drive propulsion steering units aft. The main engines are Detroit Diese model 16V-149TI-DDEC, each rated 1,500 bhp ai 1,700 rpm. The Z-drives are Niigata model ZP-2A fitted with nozzles. Steering is by electric motors controlled by a Mechtronics solid state frequency modulating system. The heavy duty bow fender is from Shibata, overlain with aircraft tires for im- proved adherence.

On trials, the tugs performed to expectations, with a free running speed of 12.4 knots, and bollard pulls of 39.91 tons ahead and 38.10 astern.For more information on the capabilities of Vancouver Ship- yard,

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