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Products & Services

Cranemaster® Units

View our broad range of shock absorbers and heave compensators.

Engineering Services

Cranemaster has the experience, knowledge and tools to perform a wide variety of engineering services.

Offshore Handling & Assistance

Up-ending frames, shackle options and unique solution for rigging height reduction.

Frequently Asked Questions

What is a Cranemaster passive heave compensator?2019-06-24T12:41:08+01:00

A Cranemaster passive heave compensator (PHC) is a spring-damper system based on gas pressure and hydraulic fluid. As it is self contained, no external connections of hoses or wires are required.

Cranemaster PHC Working Principle
Will a Cranemaster shock absorber have any effect on peak loads for lifts in air?2019-06-24T12:25:04+01:00

Yes, utilization of a Cranemaster shock absorber will have an effect on peak loads for lifts in air. When there is relative motion between a lifted object and the boom tip, a snap load will occur. As a consequence, the dynamic amplification factor (DAF) will increase and potentially lead to unacceptable high peak loads. A Cranemaster unit will work as a shock absorber, efficiently removing these snap loads, and as a result reduce DAF and improve safety. Typically, this will enable you to conduct such lifts in higher sea states, and thereby increasing the operational weather window.

Will Cranemaster passive heave compensators reduce motion in air?2019-06-24T12:13:23+01:00

No, as Cranemaster passive heave compensators rely on external forces to reduce motion, they will have no impact on the movements of free hanging objects in air.

What is the difference between Active Heave Compensation (AHC) and Passive Heave Compensation (PHC)?2019-06-24T11:45:52+01:00

Both Active Heave Compensation (AHC) and Passive Heave Compensation (PHC) are techniques used on lifting equipment to reduce the influence of waves upon offshore operations. AHC differs from PHC by having a control system that actively compensates for any movement using external energy. Passive systems reacts to external forces without additional energy to control the motion. 

Can Cranemaster passive heave compensators be used together with active heave compensated systems?2019-06-24T11:48:14+01:00

Yes, Cranemaster units will work perfectly together with AHC that responds to inputs from an accelerometer.

Can Cranemaster heave compensators be used to reduce dynamic hook loads when lifting through the splash zone?2019-06-24T12:15:04+01:00

Yes, Cranemaster heave compensators are designed to instantly respond to its surroundings, take up slack wire and reduce dynamic loads.

What is the deepest operating depth for a Cranemaster passive heave compensator?2019-06-24T11:56:11+01:00

Cranemaster units are certified for operations down to 3000 meter. As of today Cranemaster units has been used at close to 3000 meter water depth.

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