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..

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