Increasing workability for DP2 self-geared vessels
Clients often look for more work for self-geared DP2/3 vessels, in various markets:
- Wind: TP or 2nd steel installations, floating wind component supply
- O&G: Floating installations of modules, containers, components
- Civil: Floating installations of structures, Ship2Ship transfers
- Decom: Safe extraction lifting of modules/topsides
On the Coastal Virginia Offshore Wind farm we're gathering information how well heave control is working, and it's working quite well, see below footage and data!
What you see is that even with the crane tip moving over a stroke of ~60cm (Seastate Hs 1.3, Tp 10sec), our Heave Chief 750 holds the TP still within a bandwidth of +/- 5 cm. This helps in carefully placing the TP around the monopile, as well as a very delicate and controlled set down of the TP flange onto the MP flange.
In heavier seas, we can achieve that same absolute end-result: keep the load to within max ~7,5cm. That works in any standard heavy lift crane!
Add XY control and double workability
In the video, you clearly see that XY movements still hinder the operation. Our newest concept, the Full-Motion Chief, is capable of reducing this pendulum swing as well, by ~50-80%.
Below you see what workability this could add, for a smaller vessel, in typical North Sea conditions.
For more information on workability increase, have a look here
