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.

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.