Dynamic Positioning
General information
Dynamic Positioning (DP) and Dynamic Tracking (DT) are methodologies to keep a vessel at a certain position (DP) or track (DT) using thrusters instead of mooring lines. By measuring its position (and heading) and comparing it to the required position, the DP system on board can determine its position error. The control system reacts on that by determining what thruster action is needed to bring the vessel as close as possible to the required position. DP systems can nowadays be found on many types of vessels: drilling vessels, installation vessels, heavy lift vessels, cable and pipelaying vessels and FPSOs.

Services & Activities
The Offshore Department has a lot of expertise in the field of Dynamic Positioning. This Dynamic Positioning methodology requires insight in (Kalman) filtering of the motions, (PID) control, optimum thruster allocation, thruster capabilities and interaction, possible thuster ventilation in waves, and the optimisation of the Power consumption. All these aspects are studied by MARIN in both model tests and simulations. Also new DP methodologies are under development, such as wave feed forward to anticipate rather than to react on the action of the wave groups. Model testing of DP performance allows the optimisation of the DP system with its settings in realistic extreme situations in an effective way, something that is not possible in full scale trials.
The Trials & Monitoring Department has been involved in the DP-JIP and can assist with full-scale measurements to assess the dynamic positioning performance.

Facilities & Tools
Dynamic Positioning model tests are carried out in the following MARIN facilities :

The following tools are used to study Dynamic Positioning :

Software Sales
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.

Experience
The list below gives a review of DP projects for semi-submersibles carried out at MARIN:

  • ‘Ocean Confidence’ for Diamond Offshore
  • ‘Petrobras P-XIII’ for Petrobras
  • ‘Stena Tay’ for FELS/Stena Drilling
  • DSS semi-submersibles for Keppel FELS and Marine Structure Consultants
  • ‘Thialf’ Semi Submersible Heavy Lift Vessel for Heerema
  • S7000 Semi Submersible Heavy Lift Vessel for Saipem
The list below gives a review of DP projects for mono hulls carried out at MARIN:

  • 'Smit Pioneer’ offshore installation vessel
  • Global Marine drill ships (‘C.R. Luigs’ / ‘Jack Ryan’)
  • AESA M.O.T. for Navion
  • Saipem 10000 drillship for Samsung
  • R&B Falcon DS4M Drillship
The following Joint Industry Projects (JIPs) were focussed on DP:

  • DP JIP: development of wave feed forward
  • DP FPSO JIP
Most recent Dynamic Positioning papers presented by MARIN
(complete overview of papers can be found under Publications)

Thruster-wave Interaction during DP Stationkeeping - Model Tests in Open Water and under a Ship Hull
Hans Cozijn (MARIN), Jin Woo Choi, Young-Jun You (DSME), OMAE ASME 36th International Conference on Ocean, Offshore and Arctic Engineering, Trondheim, Norway, 2017

Determining Thruster-Hull Interaction for a Drill-Ship Using CFD
Koop, A.H., Cozijn, H.C., Schrijvers, P. and Vaz, G., OMAE ASME 36th International Conference on Ocean, Offshore and Arctic Engineering, Trondheim, Norway, 2017

Hydrodynamic modelling for the remotely operated vehicle Visor3 using CFD
Juan A. Ramírez-Macías, Persijn Brongers, Santiago Rúa and Rafael E. Vásquez, 10th IFAC Conference on Control Applications in Marine Systems (CAMS), Trondheim, Norway , 2016

Past, Present and Future of Hydrodynamic Research for DP Applications
Hans Cozijn and Eelco Frickel, MTS DP Conference, 2015

Integrating Onboard DP Systems into Model Test Facilities and Offshore Bridge Simulators
Arjan Voogt and Rink Hallmann, Offshore Technology Conference (OTC), Houston, Texas, 2015

Most recent Dynamic Positioning articles written for MARIN Report
(complete overview of articles can be found under Publications)

MARINnovatief 2017 results in seven new exploratory projects
Timo Verwoest, MARIN Report, 2017

FLNG ASV - Bridging engineering to operations
Noël Bovens & Gerrit van der Want, MARIN Report, 2017

Free basin time for SME concept testing
Jaap de Wilde, MARIN Report, 2017

Accurate calculation models for manoeuvring simulations
MARIN Report, 2015

Aasta Hansteen - Bridging engineering to operations
MARIN Report, 2015

Contact
For more information on how MARIN can help your organisation with Dynamic Positioning, please contact theOffshore Department, the Manoeuvring Department, the Trials and Monitoring Department or the Ships Powering Department.

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