Orders A n d Deliveries Of T w i n - S c r ew Schottel-Tugs Continue W o r l d w i de

Eleven more twin-screw Schottel-tugs have been ordered and/or delivered to various owners in different countries during the past few months. All of these tractor tugs will be equipped with a twin installation of the versatile Schottel Rudderpropellers for combined propulsion and steering.

The tractor tugs Piet Aucamp and Bart Crove were built by Dorbyl Marine Ltd. of Durban, South Africa, for South African Transport Services of Johannesburg. These 106.6-foot vessels are powered by twin MaK 6M332 diesels, each rated 1,224 bhp at 900 rpm.

Two units for Taiwan are owned by Taichung Harbour Board and built by Taiwan Machinery Manufacturing Corporation. Their propulsion machinery comprises two Stork-Werkspoor SWD 8FHD240 diesels, each with an output of 1,700 bhp at 1,000 rpm.

Two Schottel-tugs for Turkey were built by Marmara Transport A.S. of Istanbul for Turkish Petroleum Corporation of Izmir. They are propelled by two MaK 6M282 engines, each rated 1,360 bhp at 1,000 rpm. Yokohama Yacht Company in Japan built two tugs for Arabian Gulf Mechanical Services and Control Company of Safat/Kuwait. These 92-foot vessels are powered by twin Yanmar T260ST diesels, each with an output of 1,250 bhp at 750 rmp.

Red Funnel Group of Southampton, U.K., ordered two tractor tugs from McTay Marine Limited of Merseyside. With a length of 91 feet, they are powered by twin Stork-Werkspoor 6FHD240 engines.

The stern-driven Schottel-tug Ferdinand Verbiest was built by Scheepswerf Jonker & Stans NV in the Netherlands for Scheldt Towage Company of Antwerp, Belgium. This 101-foot vessel is powered by two Deutz S/BV 6M628 diesels, each rated 1,360 bhp at 1,000 rpm.

As mentioned earlier, all of these tugs are equipped with two Schottel Rudderpropellers as combined propulsion and steering units. These units can be mounted either forward or at the stern of the vessel, depending on the operational area and the permissible draft.

In the case of forward installation, the units can also be recessed into the hull to reduce draft.

In deep-water operational areas, the forwarddrive Schottel-tugs have proved their excellent ability over many years. The vessels are extremely stable in the water due to the forward mounting of the Rudderpropeller with its protection plate, and are easily maneuvered even in heavy seas. The combination of the forwardmounted propellers with the towing hook near the stern produces very positive stability, eliminating the danger of capsizing.

For further information on Schottel-tugs and Rudderpropellers., Circle 25 on Reader Service Card

Maritime Reporter Magazine, page 45, Sep 1985

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