Page 11: of Maritime Reporter Magazine (April 1998)

for savings in time and money through single input of technical data, improved calculation tools for con- cept design and design assessment, and advanced facilities for data exchange with ship design systems.

It is built around the concept of a ship definition, or product model, rapidly created during the design and construction process and subsequently updated throughout the service life of a ship. Such a facility, which may combine owners' inspections, repair and class surveys, can lead to a more focused mainte- nance program. The living record can also be estab- lished for existing vessels.

LR is involved in an EU-sponsored research pro- gram aimed at developing the means for the man- agement and transfer of ship hull data throughout a ship's life cycle. It is also collaborating with leading suppliers of ship design systems with a view to incor- porating a ShipRight Rules calculation facility into commercial software.

The message from the society is that "safety and sound operational practice need not exclude sharp- ened commercial advantage."

Electrical Drives For Offshore Applications

Long favored for applications in research vessels, cable layers and icebreakers, electric propulsion has now become the mode of choice for most of the lead- ing cruise ship operators, while finding increasing favor among specialized sectors of the tanker indus- try and certain areas of the ferry business.

Electric drive is now raising its profile in the off- shore support vessel sector. Wagenborg's innovative breed of ice-breaking supply ship, ordered from

Kvaerner Masa-Yards and specified with twin Azipod propulsors, melds the Dutch company's longstand- ing business and trading links in the Baltic domain with the latest, Finnish-led technology in electric dri- ves. In a new initiative, progressive Norwegian oper- ator Simon Mokster has settled on diesel-electric powering for a versatile new class of support vessel ordered from Dutch builder YVC Ysselwerf.

The Marin Teknikk multi-purpose, platform supply vessel and pipe carrier design selected by Mokster incorporates four main diesel generators covering all energy needs and controlled by a power management system.

I Electrical energy will be fed to a pair of frequency-

I regulated propulsion motors driving contra-rotating

Ithruster propellers.

The two newbuildings have been engineered to the meet the demanding requirements of the prospective

Norwegian charterer in regards to fuel consumption and exhaust gas emissions.

Such vessels characteristically spend a high pro- portion of time in maneuvering and position-holding.

The system adopted will reportedly give total fuel- savings of 10 to 15 percent over conventional arrangements based on diesel-mechanical drives, shaft generators, rudder and auxiliary engines.

The designers also anticipate reductions of harmful exhaust emissions in the order of 35 percent.

Such investment would appear timely given not only the increasingly sophisticated demands of off- shore industry in northern waters, but also the

Scandinavian emphasis on environmental accept- ability, which provides something of a beacon for the rest of Europe.

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