Active heave compensated hoisting system

Advanced control system

Our dedicated control software identifies potential resonance hazards. It actively neutralises the typical frequency to avoid the risk of resonance. A safe lowering operation can be demonstrated by logging force, speed and accelerations during the entire lowering operation.

Neutralising resonance

The system not only balances out the motion caused by waves and swell; its dedicated control software also identifies potential resonance hazards and actively neutralises the typical frequency to avoid the risk of resonance. A safe lowering operation can be demonstrated by logging force, speed and accelerations during the entire lowering operation.

Quick lift

The integrated quick lift mode is activated on the through of a wave to perform a controlled lift without risk of reimpact to the seafloor.

Smooth transition

Moreover, this advanced system has a splash zone mode that keeps the hoisting wire tensioned the moment the load enters the waves. The transition between resonance avoidance mode, landing mode, active tension mode and quick lift mode is performed smoothly to avoid sudden uncontrolled movements.

Splash zone crossing

Instant wire load changes occur when entering the waves. Our AHC system keeps the hoisting wire tensioned – and minimises uncontrolled motion.

Subsea landing

A stepless, controlled and low landing speed is essential for a safe landing. Our integrated approach ensures the highest motion reduction even at water depths of up to 3,000m.