Cranemaster raises the bar with the world’s largest 3000T passive heave compensator
A game-changer in Offshore Heavy Lifting Industry
As offshore structures continue to increase in scale and weight, installation contractors are encountering challenges that push beyond the capabilities of traditional crane capacity. In these environments, the primary challenge is no longer just the static weight of the load, but the dynamic forces created by vessel motion and load interaction.
The CM3-3000T-5500-A, a new class of shock absorber, was developed specifically for this reality and it was born out of a direct collaboration with Heerema Marine Contractors, one of the world's leading offshore installation contractors.
Recognising the scale of upcoming installation campaigns, Heerema approached Cranemaster to develop a passive heave compensation system capable of managing extreme dynamic forces that existing technology could not address. The result is the largest shock absorber ever produced.
Developed to safely manage loads of up to 3000 tonnes, this is the largest shock absorber ever produced. It has already been proven in offshore wind installation, operating in real offshore conditions where predictable motions and controlled load transfer are essential. The unit is scheduled for further offshore wind deployment later this year, reflecting the growing demand for solutions capable of handling the increasing scale of modern projects.
Designed and manufactured in Norway, the Cranemaster CM3-3000T-5500-A is a passive heave compensation unit with a Safe Working Load (SWL) of 3,000 t and a dynamic capacity of up to 3,510 t. The unit was manufactured in close collaboration with Servi AS, whose precision engineering and fabrication expertise were instrumental in bringing this record-breaking design to life. The unit features a 5,500 mm stroke length and a multi-accumulator system that can be controlled independently, allowing the response characteristics to be tuned to specific load cases. This configuration enables effective absorption of transient dynamic loads during offshore lifts, reducing peak forces transferred to the crane and structure.
In practice, this allows heavier components to be handled more safely, improves control during high-energy load events, and increases the range of sea states in which lifting operations can be executed.
Source: Servi AS
What a 3000-Tonne Passive Heave Compensator (PHC) & Shock Absorber Changes for Offshore Lifting
At this scale, heave compensation and shock absorption directly impact how offshore projects are planned and executed:
• Heavy lifts up to 3000T Enables single-lift handling of massive structures, reducing offshore time, complexity, and cumulative risk.
• Next- generation offshore wind installations As foundations and piles continue to increase in size, the unit provides essential pile run protection, controlling dynamic loads in both landing piles and pile hammering during installation.
• Supports large-scale jacket installations with gradual load transfer Facilitates safe and controlled installation of heavy subsea structures such as jackets, by maintaining constant tension and enabling gradual load transfer, reducing risk during landing and alignment.
• Large- scale decommissioning and salvage Allows entire structures to be lifted and removed intact, avoiding the need for cutting and sectional removal.
• Improved safety margins in demanding conditions Reduced dynamic loading lowers stress on equipment and improves overall operational stability.
Proven through full-scale testing Prior to deployment, the CM3-3000T-5500-A completed a comprehensive full-scale testing programme in Norway. Extreme load cycles, dynamic response behaviour, and structural integrity under wave-induced motion were validated through physical testing and advanced simulations, in line with international offshore lifting standards.
By mounting two 3000-tonne Cranemaster units in parallel, a combined 6000t capacity for both passive heave compensation and shock absorption is achievable.
This field-proven configuration enables safe and controlled handling of the heaviest offshore structures of the future, while maintaining full motion mitigation and load protection performance.
Source: Servi AS
Built to withstand. Engineered to adapt.
For more than 40 years, Cranemaster has supported the offshore industry with shock absorbers and heave compensation systems that evolve alongside project demands - enabling safer lifts, broader weather windows, and greater operational confidence as offshore operations continue to scale.
As offshore wind, decommissioning, and heavy marine operations push into new weight classes, the CM3-3000T-5500-A is designed to meet that challenge head-on.
Offshore projects aren’t getting smaller, and the way heavy lifts are planned can’t stay the same. When load weights, pile sizes, and structural complexity move into a newweight class, shock absorption becomes a core part of the lifting strategy, not an afterthought.
The CM3-3000T-5500-A is built for operations where margins are tight, consequences are high, and control makes the difference. If you’re planning ultra-heavy lifts, large- scale decommissioning, or next-generation offshore wind installations, Get it touch and tell us about your operation.
