Installation of 6 large structures in the South China Sea. The dry weights of the structures were in the order of 200-400 metric tons. Due to the water depth of 1500 meter, potential risk of resonance had to be mitigated.
By using two Cranemaster® passive heave compensators with SWL of 400 metric tons in parallel configuration, the resonance frequency was shifted out of the operational weather window such that risk of resonance was not limiting the operational weather window for the operation. A swivel of 700 metric tons was used to avoid torsional forces in the parallel configuration.
The successful completion was a result of joint analysis and cooperation between Cranemaster and the customer.