Motion Control Systems

Active Vertical Motion Damping System

Our unique vertical motion damping system consists of two fully-automatic sub-modes: Boarding Control System (BCS ™) and Ride Control System (RCS). The two modes are easily switched between on the operator interface touchscreen according to required operating mode, either Transit or Boarding.

Boarding Control System (BCS™)

A simple “step-off”

WAVECRAFT ™ Boarding Control System (BCS ™) offers unrivalled safety and access capabilities, even in high sea states. Once a vessel approaches an offshore installation or wind turbine, the BCSTM is engaged.

The BCS TM controls the air-cushion lift force dynamically in such a way that it counteracts the vessel motions. The air-cushion lift force, hence the air-cushion pressure is controlled through varying the leakage area out of a set of vent valves. It significantly reduces heave and pitch motions, providing safe ‘step-off’ access for personnel transferring from the vessel to an offshore structure.

Another major advantage of the BCS TM is the smoother transit for passengers, with documented reduction in seasickness. This in turn, results in more efficient operations of service technicians at offshore installations.

Ride Control System (RCS)

A smooth comfort at all speeds

All WAVECRAFT ™ vessels use surface-effect ship (SES) and air-cushion catamaran technologies with an active ride control system (RCS). The RCS reduces wave-induced pressure fluctuations in the cushion and, hence, vertical motion. Control of pressure fluctuations is achieved by dynamically modulating the position of air-cushion vent valves. The very same vent valves used during BCS operation.

The constant responsiveness of the air-cushion means that the vessel is subjected to fewer acceleration peaks caused by encountered sea waves and various air-cushion resonances.

These elements combine to deliver extremely good seakeeping capabilities, a smooth ride, high comfort for passengers and a safe transit onto offshore installations and other craft.