First order for offshore wavepiercer design

The bow design is described by the company as ‘visually striking’. It aims to provide similar advantages to the now-familiar X-bow from Ulstein, but by taking a different approach, Rolls-Royce claims it offers certain benefits to shipowners. The major ‘plus’ point, according to the company, is that it will enable the vessel to pierce through waves in extreme weather conditions, while maintaining constant speed, reducing fuel consumption and enhancing safety.

The contract includes vessel design and a comprehensive integrated power and propulsion system and equipment package for the advanced platform supply vessel (PSV). The contract also includes an option for a second vessel of the same specification and value.

Extensive research and computer aided design methods, verified by tank testing, have enabled the designers to reduce hull resistance substantially through the development of a wave-piercing hull form, which is claimed to eliminate slamming and to allow for a smooth ride even in rough weather conditions.

In addition to the ship design, Rolls-Royce will supply Azipull propellers, thrusters, and Bergen diesel engines. The main propulsion is provided by two 2,500kW Azipull 120 CP thrusters with pulling propellers. The beam of the newbuilding allows the electric motors for these to be installed athwartships, freeing more space lengthwise for cargo tanks. The main thrusters are supplemented by two 883kW supersilent tunnel bow thrusters and a swing up azimuth bow thruster also rated at 883kW. The diesel electric power plant comprises three Bergen C25:33L9A generator sets each developing 2,735kWe. In addition there is a high speed 500kWe harbour genset and a separate 200kWe emergency genset.

A Rolls-Royce DP2 dynamic positioning system, which uses satellite technology to accurately position the vessel, is also included.

The new vessel ordered by Farstad is designated the UT 754 WP design. It will be fitted out by STX Offshore Norway at its Langsten shipyard.