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June 11, 2002

Maersk Supply plans multipurpose deepwater OSV

The A.P. Moller Group's Maersk Supply Services has decided to build and equip a vessel that will be able to perform a variety of tasks related to deep and ultra deep water exploration, production and construction work.

This multi-purpose offshore support vessel will be fitted with a 200 tonnes KENZ marine crane on the aft deck at the starboard side. The crane is designed for fully heave compensated lifts of 200 tonnes to 1,000 m water depth using double fall wires and 100 tonnes to 2,000 m water depth using a single fall. The crane can work over both sides of the vessel as well as over the stern.

Ballast control will be installed to compensate the vessel's heel during lifting operations. Operational work criteria for the crane are carefully matched to the vessel's stability and sea keeping capabilities.

When not in operation the crane boom stows on top of the vessel's winch garage. In the stowed position there is ample height of between 7.5 m and 10 m under the boom ensuring the starboard side of the deck can be fully utilized. The crane, which will be operated by dedicated and qualified crane operators, has several built-in redundancy systems to ensure safe operation at all times.

A centerline moonpool, with a built-in wave damping system, will also be installed on the vessel. Measuring 5.2 m x 4.38 m and situated forward on the main deck, the moon pool can be serviced by the crane or by the main winch for heavy sub-sea lift operations and can be used for ROV deployment and guideline operations. Bottom and top hatches seal the pool watertight when it is not in use.

The vessel will have all the features of an ultra deep water anchorhandling vessel; impressive drum spooling capacities intended both for conventional rig mooring systems as well as fiber rope deployment and retrieval. Four very large chain lockers, with a total capacity of 1,122 cu.m, are built-in directly under the main winch. They can accommodate long lengths of chains of up to 7 inch diameter.

All the vessel's anchorhandling and towing capabilities, as well as the cargo carrying capacities, are maintained, which with the crane capability, gives the vessel flexibility for performing multiple tasks.

The dynamic positioning system uses the latest technology in references systems, mainly DGPS and HIPAP hydroacoustics with built-in features for ROV tracking and array positioning. With a large installed horsepower and powerful side thrust capacity, the vessel is able to hold DP position in very rough weather conditions.

The vessel has accommodations for a total of 70 people, ensuring that the necessary space is available for expert personnel, surveyors and client representatives.

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