The company provided a 10m catamaran which was used for the installation and maintenance of two meteorological masts as well as other wind farm related works such as ornithological and hydrographic surveys. The experience has been incorporated into the design for 'Windcat', a new class of vessels being developed by WCW specifically for wind farm activities.

Windcat is a quick, efficient and versatile water taxi of 15m LOA with a 6.1m beam.

The hull form design has incorporated lessons learned when transferring personnel to wind turbine structures in 2m seas churned by 30 knot winds.

The result minimises pitching when the bow is to the structure, maximising the number of days on which it is safe to work and also providing technicians with a comfortable voyage to the structure.

A high standard of accommodation for two crew and 12 personnel includes comfortable seating, microwave oven, refrigerator, WC and shower. There is also separate sleeping accommodation for four personnel working extended shifts in compliance with HAS regulations.

Windcat is powered by Cummins NT 14M engines rated below their maximum output for economy and reduced maintenance but still capable of taking the vessel to 25 knots.

Electrical power is appropriately supplied by an innovative Wispergen external combustion engine which produces 6kW through two Victron converters and also supplies all the domestic hot water.

The design incorporates a strengthened bow with impact absorbent fendering, with a clear foredeck for the safe transfer of personnel. A payload of 4 tonnes can be carried on the cargo deck, serviced by a 1 tonne crane. The vessel was surveyed under the MCA SVC code full stability book.

The first Windcat was immediately chartered by Fugro Geos to take technicians to and from the meteorological masts on Shell Flat. This is the first in an anticipated series of craft and WCW has been in discussion with a number of wind farm operators of sites throughout Europe.

MJ Information No: 19568