Under which conditions may positioning be improved by increasing 'Control Gain'?

Increasing the 'Control Gain' can enhance the performance of a dynamic positioning (DP) system, particularly in situations where external forces are acting on the vessel, such as increased wind or current conditions. In these circumstances, the vessel is subjected to unpredictable and often substantial forces that can impede its ability to maintain a stable position. By increasing the control gain, the DP system becomes more responsive to these disturbances, allowing for quicker adjustments and a more effective counteraction against such environmental influences.

Higher control gain means that the system is more aggressive in its response to deviations from the set position, which is beneficial when external factors are challenging the vessel’s ability to maintain its desired location. This adjustment helps to keep the vessel on station, improving overall positioning control and stability in adverse conditions.

In contrast, scenarios such as being stationary in calm water or operating on a fixed course do not typically require an increase in control gain. In these situations, external disturbances are minimal, reducing the need for the system to aggressively counteract any deviations. Therefore, the optimal application of increased control gain is in response to the significant challenges presented by heavy winds or currents.