What is the typical response of a DP vessel when one of its reference systems fails?

In the event of a failure in one of its reference systems, a Dynamic Positioning (DP) vessel typically relies on the remaining functional reference systems to maintain its position. This approach ensures that the vessel can continue to operate with a reduced but still effective ability to monitor and control its position. DP systems are designed with redundancy in mind, which means they often incorporate multiple reference systems (such as DGPS, laser systems, and inertial sensors).

When one system fails, the DP system automatically compensates by utilizing the data from the remaining operational systems to maintain the vessel’s position and heading. This method enhances operational safety and allows the vessel to remain in control without needing to switch to manual controls or relying on outdated information.

Using historical data may not provide real-time positioning, which is crucial during dynamic operations, and going into emergency shutdown mode would not be a typical response as it could result in unsafe conditions, particularly in the dynamic environment in which these vessels operate.