Page 45: of Maritime Reporter Magazine (September 1985)

Orders And Deliveries Of

Twin-Screw Schottel-Tugs

Continue Worldwide

Eleven more twin-screw Schottel-tugs have been ordered and/or delivered to various own- ers 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 propul- sion and steering.

The tractor tugs Piet Aucamp and Bart Crove were built by Dorbyl Marine Ltd. of Durban,

South Africa, for South African Transport Ser- vices of Johannesburg. These 106.6-foot vessels are powered by twin MaK 6M332 diesels, each

Twin-screw Schottel Tugs with Rudderpropellers mounted forward—forward recessed into the hull—and at the stern of the vessel. 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 pro- pelled by two MaK 6M282 engines, each rated 1,360 bhp at 1,000 rpm. Yokohama Yacht Com- pany in Japan built two tugs for Arabian Gulf

Mechanical Services and Control Company of

Safat/Kuwait. These 92-foot vessels are pow- ered 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 Ver- biest 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 forward- drive Schottel-tugs have proved their excellent ability over many years. The vessels are ex- tremely stable in the water due to the forward mounting of the Rudderpropeller with its pro- tection plate, and are easily maneuvered even in heavy seas. The combination of the forward- mounted propellers with the towing hook near the stern produces very positive stability, elimi- nating the danger of capsizing.

For further information on Schottel-tugs and

Rudderpropellers.,

Circle 25 on Reader Service Card

Meco's "Targa" Technology

Boosts Water Maker Efficiency —Literature Available

A new generation of vapor compression water makers, equipped with a patented feedwater treatment system called Targa that is said to cut operating costs by up to 30 percent, has been introduced by Mechanical Equipment Compa- ny, Inc. (MECO) of New Orleans.

The new Targa technology involves mixing a portion of the vent gases with boiling salt water that has been treated with an alkaline scale inhibitor. This allows vapor compression units, which have traditionally operated economically, to operate even more efficiently and reliably for extended periods without significant scale buildup.

By comparison, a standard vapor compression unit not equipped with the Targa system and operating at 100 percent capacity would require cleaning and descaling an average of every 25 operating hours. A Targa-equipped unit will go an average 500 hours between cleanings.

Targa-equipped units from MECO are al- ready being used with great success on offshore and onshore petroleum industry rigs and plat- forms, in power plants and water utilities, on island resorts and remote construction sites, and in new U.S. Navy and Coast Guard vessels.

For further information and free literature on the Targa system,

Circle 27 on Reader Service Card

New Method Of Inspection

Used By Pacific Marine

Is Cost-Effective —Literature Available

Trained inspection divers from Pacific Ma- rine Services, Terminal Island, Calif., recently performed an internal tank inspection for the

American Bureau of Shipping Close-up Survey for Special Survey #3 for Hull using a helmet- mounted video camera and lighting. The new method of inspection, which took place on the

M/V Overseas Boston in Long Beach Harbor,

Long Beach, Calif., allowed a single diver to per- form video and gauging operations simulta- neously.

Using purpose-built video and ultrasonic equipment which both recorded and trans- mitted data to topside personnel, an ABS sur- veyor was able to witness and approve the inspection. Documentation was done by video taping to record both wall thickness gaugings and close-up visual survey. Data was also re- corded by a topside inspection engineer, and tank drawings were used to track the diver through the tanks and record locations of gaug- ings.

This innovative method of inspection is said to be very cost-effective because the ship's schedule is not interrupted and tank scaffolding or floating during the shipyard period is avoid- ed.

For free literature on Pacific Marine Services inspection services,

Circle 24 on Reader Service Card ^^^^JJ^^^^CORROSION COATINGS

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Worldwide Service

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Lafayette, La 70502 318-234-6327 TLX 586602

Circle 155 on Reader Service Card

September 1, 1985 f a Til -i Naval 0 ^ I ¥

ANTENNA

SYSTEMS • CABIN OUTLETS • NO ROTOR REQUIRED • VCR INPUTS • MARINE ENGINEERED

CMC COMMUNICATIONS 5479 JETPORT BLVD., TAMPA, FL33614 (813) 885-3996

Circle 114 on Reader service Card

DEL GAVIO

MARINE HYDRAULICS, INC.

SERVICE • CONSULTING • PARTS

Complete Repairs

On All Types of Electro Hydraulic

Steering Systems

Hydraulic Pump Testing,

Rebuilding For Certification 24 Hour Service, Worldwide 207 West Central Ave., Maywood, N.J. 07607

Telephone: (201) 843-4700

Circle 340 on Reader Service Card 45