RAL z-drive tug delivered to Svitzer Australia


(VANCOUVER, British Columbia) — Svitzer Australia recently took the delivery of the Robert Allan Ltd. (RAL) designed RAstar 3000-W series ASD tug, Svitzer North, from ASL Shipyard, Singapore. The design was developed in close co-operation with Svitzer’s operations team, to meet the unique demands of the Port of Geraldton, Western Australia.

With over 400 ship visits per year, the port’s primary cargo is iron ore. The port is located in a sensitive environmental area, requiring the tug to be at the forefront of safety and reliability, and to ensure the safety of all ships entering and leaving the port. The tug is diesel powered, fitted with twin azimuthing thrusters, and is designed for maximum efficiency and value in the performance of escort and ship handling duties of large tankers, bulk carriers, and container ships.


Particulars of Svitzer North are:

Length overall: 30.0 m
Beam, molded: 13.2 m
Depth, molded: 5.63 m
Maximum navigational draft: 5.50 m
Gross tonnage: < 500

Tank capacities are:

Fuel oil: 155 m3
Potable water: 20 m3

The tug is designed and constructed to satisfy all applicable Rules and Regulations of Lloyd’s Register of Shipping (LR) and the Australian NSCV for an escort tug with the following notation: LR ✠ 100 A1, Escort Tug, ✠ LMC, UMS, IWS, Unrestricted Navigation

On trials, Svitzer North met or exceeded all performance expectations, with the following results:

Bollard pull, ahead: 71 tonnes
Bollard pull, astern: 68 tonnes
Free running speed, ahead: 13.6 knots

The vessel has been designed to the highest standards of outfitting for an operating crew of up to 10. The master and chief engineer’s cabins along with the galley and mess are located on the main deck. There are four double crew cabins on the lower accommodation deck, as well as a laundry room.

The tug has been outfitted for safe and efficient performance of ship handling and harbor towing. The deck machinery comprises an Ibercisa hydraulic double-drum escort winch and two hydraulic vertical anchor windlasses on the bow. The escort winch is spooled with a high-performance soft line on each drum. In addition, a towing hook is provided on aft deck.

Main propulsion for the tug comprises of a pair of Caterpillar 3516C IMO Tier II certified diesel engines, each rated 2,240 bkW at 1,800 rpm, and driving a Schottel SRP 460FP z-drive unit.

The electrical plant consists of two identical Caterpillar C4.4 ship service generators, each with a power output of 86 ekW at 50 Hz.

Ship-handling fenders at the bow consist of one tier of cylindrical fender at the forecastle deck level and W-block fenders below main deck level. The same type W fender is used at the stern and D-fender along the sheer lines of the main deck.

– Robert Allan Ltd.

By Professional Mariner Staff