Developed together with the end-user
A monohull form has been selected to minimise accelerations caused by roll motions, reflecting considerations that the SOV will be on DP 80% of the time at speeds between 0-5 knots. The bow section has been lowered to create a V-shape. This offers significantly reduced slamming, facilities inclusion and improved operation of the bow thrusters. The strong V-shape in the frames in the aft ship reduce slamming occurrence, while the concentration of volume in the midship region achieve a slender aft. Both features make stern to weather operations more comfortable than on a conventional PSV.
Innovation as standard
These innovations lead to increased, safer access to the wind energy sector, thereby contributing to lower energy costs. Seakeeping analysis of systematic variations of hull design and dimensions verified are by tank tests. More access, more comfort. Balanced low lateral wind profile and shallow draught contribute to reduced power demand while station-keeping in beam-on conditions. Focus on high-speed transits between turbines while remaining in DP. DP controllers, gangway systems and seakeeping characteristics assessed in hardware-in-the-loop (HIL) test. The HIL enables us to carry out a site specific assessment based on the local metocean data. This in turn gives the owner operator more certainty about the capabilities of the vessel.
Life on board
Accommodation areas are located amidships to minimise vertical accelerations (15% below a conventional PSV). The vessel accommodates engineers whose previous experience may be land-based. Avoidance of seasickness and perception of a comfortable working environment will influence their acceptance of extended stays at sea. Rest areas have been designed to improve life at sea and ensure readiness of personnel for work. Natural light has been maximised and the vessel will also feature a recreational space.
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Motion compensated gangway for safe, transfer
The primary access solution is a motion compensated access gangway system (Uptime) aligned with the vessel’s DP system. This gangway, in combination with the integrated elevator, offers safe and stepless access from the covered warehouse to the offshore structure. For a high level of redundancy, alternative transfer methods are included, including helicopter access and a daughter craft.
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Logistics
All internal spaces have been designed with logistical or personnel flow in mind. A well routed workflow supports an improved working environment, yet preserves a high convenience level.
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