Page 48: of Maritime Reporter Magazine (May 2005)

48 Maritime Reporter & Engineering News

Wärtsilä won an order to supply the 19.7 MW power plant for a 673.6 x 105.6 x 19 ft. (205.3 x 32.2 x 5.8 m) yacht carrier contracted by Dockwise

Shipping BV to be built at Yantai Raffles

Shipyard in China, due for delivery in autumn 2006.

The cargoes of yachts will be loaded by floating them over the deck, which measures 541 x 101.7 ft. (165 x 31 m), while the vessel is ballasted down. This vessel is the first to be designed and built for carrying luxury yachts.

Dockwise has built up the yacht trans- port business since 1987 and owns four converted semi-submersible vessels dedicated to this business. The new ves- sel will be employed in carrying yachts primarily across the North Atlantic with monthly sailings between

Florida/Caribbean and the

Mediterranean. The vessel will have a service speed of 18 knots.

The new yacht carrier will be equipped with a 19,680 kW diesel-elec- tric plant for propulsion, ancillary elec- trical power, and all shipboard electrical services. The plant will be powered by two Wärtsilä 12V38B main diesel gen- erating sets, two Wärtsilä 6L20 auxiliary generating sets, and a 300 kWe emer- gency/harbor generating set. The gener- ating sets will supply twin Lips CS3500 pull thrusters for propulsion.

Maneuverability will be enhanced by a 1.64 MW Lips CT225 transverse bow thruster. The two 5.1 MW azimuthing pull thrusters will each be equipped with a 4 m-diameter Lips skewed, pulling, controllable-pitch propeller and

Sternguard MK2M shaft seals.

This is one of the first vessels to be equipped with Lips pull thrusters. The propeller is arranged ahead of the pod to achieve the best overall hydrodynamic efficiency and steering at high ship speeds.

Circle 22 on Reader Service Card

Directory: Marine Propulsion Spares & Repairs

Yacht-Carrying Pioneer Powers Up

Caterpillar Marine Power Systems now offers the new C9 genset package that combines the Cat C9 aux- iliary engine with a Cat generator for a complete, ready-to-install package. The IMO-compliant package was available beginning in March 2005.

Caterpillar gensets arrive at the shipyard as one com- plete unit, including the engine, generator, coupling and other mechanical additions. The only steps per- formed outside of the controlled Caterpillar factory environment are installation and required onboard functional tests. The factory-packaged gensets use only Caterpillar parts.

Caterpillar designed for the installation to be espe- cially easy by mounting the C9 genset on base rails with internal vibration isolators already installed. With the base rails distributing the genset's weight over a large area, vessel builders can install the generator just about anywhere. There is usually no need to mount the genset to structural beams.

The 8.8-liter displacement C9 genset provides elec- trical power on demand for a variety of vessels, includ- ing yachts, supply vessels, crew boats, tugboats and ferries.

The C9 genset is available in six ratings (three 60

Hertz ratings at 1800 rpm and three 50 Hertz ratings at 1500 rpm) and features a choice of keel cooled or heat exchanger cooling options. Its weight ranges from 3865 pounds to 4195 pounds (1753 kg to 1903 kg).

The C9 genset features elements of Caterpillar's

ACERT Technology, which combine to minimize smoke and reduce emissions, making the genset IMO compliant and capable of meeting all current emission regulations. The technology provides advancements in fuel delivery, electronics, air management and com- bustion chamber design. In addition, ACERT

Technology provides a clear path to meet future emis- sion regulations.

Circle 28 on Reader Service Card

Table 1

C9 Genset Ratings and Fuel

Consumption ekW at 0.8 pf KV·A Aspiration rpm U.S. gph L/h 60 Hertz 175 219 TA 1800 13.7 51.8 215 269 TA 1800 16.9 63.8 250 313 TA 1800 17.9 68.1 50 Hertz 150 188 TA 1500 10.9 41.6 175 219 TA 1500 12.9 47.7 200 250 TA 1500 14.2 53.7 ekW - electrical kilowatts

TA - turbocharged aftercooled

L/h - liters per hour

U.S. gph - U.S. gallons per hour pf - power factor

Caterpillar Debuts C9 Marine Genset

HMS Endurance Get New

Sterntube Seals

Metalock Engineering UK's expertise in deep hole drilling in-situ is not frequently called for but recently it was put to the test for Deep Sea Seals enabling them to retrofit new sterntube seals to

HMS Endurance, the Royal Navy's Ice Patrol and

Research vessel. A Class 1 Icebreaker, the ship was originally built in Norway in 1990, HMS

Endurance had been experiencing oil leaks to sea and oil ingress to its sterntube lubricating system.

Deep Sea Seals (DSS) were called in to supply and install new outboard and inboard seals and all the necessary pipework to connect with the tanks for the inboard lubricating system. DSS fitted an

AC/Mk2 Coastguard anti-pollution seal system which differed from the existing system and required modified pipework. Previously, only a single barrier seal had been used which was fed by a gravity lubrication system. The new AC sys- tem needed to be pump fed. The new pipe config- uration necessitated through-hole access holes in the aft and forward prop shaft bearing bosses, and new drilled and tapped holes for the outboard AC seal. This work was contracted to Metalock

Engineering who, in addition, undertook respon- sibility for the new pipework (seal pipes) and nec- essary tanks installation.

Circle 23 on Reader Service Card

The yacht-carrying dockship of Dockwise

Shipping BV will be equipped with a Wärtsilä diesel-electric power plant, Lips pull thrusters,

Lips transverse thruster and Sternguard seals.

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