For more than 30 years, MARIN has been heavily involved in Joint Industry Projects for the offshore sector. During these projects oil companies, contractors, engineering firms, authorities and researchers work closely together to resolve common challenges. Although sharing costs is a good reason for working this way, the real gain is the technical input, the common understanding and the consequential implementation of findings in the industry.


HELIOS


HELIOS is a public-private co-operative project improving the workability and safety of helicopter operations on off- shore vessels. A rational methodology has been developed for determining operational envelopes for specific heli- copters and arbitrary ships. The scope of work comprises derivation of criteria, evaluation of motion and wind severity indices, recommended practice, wind tunnel tests, heli-vessel simulator tests and field trials. During the project innovative systems such as heli-deck motions visualised in the cockpit and real time prediction of heli-deck quies- cent motion periods will be evaluated. Contact: Henk van den Boom (h.v.d.boom@marin.nl)


ROPES With the increase in ship size and the planning of new terminals, the effects of passing ships on berthed vessels has become an important issue. The Research on Passing Effect of Ships (ROPES) initiative aims to provide com- putational tools to predict the loads on berthed vessels so that the motions, line and fender loads can be computed in a reliable way. The project comprises software development and delivery, model testing and full-scale monitoring. Better insight will be gained but at the same time, sufficient data will be collected to develop and validate numerical tools for dynamic analysis of moored vessels to provide solutions for existing and new port and terminal developments. A Best Practice will also be developed. Contact: Jo Pinkster (jo.pinkster@ pmh-bv.com) or Henk van den Boom (h.v.d.boom@marin.nl)


Wave Feed Forward In the ONR sponsored STLVAST project, the application of Wave Feed Forward to improve Dynamic Positioning performance has been studied. Model tests were carried out with a scaled model equipped with a DP system with Wave Feed Forward. By smart filtering and dedicated procedures of measuring and looping the Wave Forces into the DP controller, the positioning excursions were reduced by more than 50%. This positioning improvement is obtained in a hydro-dynamic testing laboratory using the MARIN DP control- ler. To continue with the development of Wave Feed Forward for single ship DP operations in service conditions, the Wave Feed Forward JIP has been initiated by MARIN and Oceaneering. Contact: Rink Hallmann (r.hallmann@marin.nl)


More information on all JIPs can be found at www.marin.nl and www.fpsoforum.com report 17


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