Incorporating Rate of Turn (ROT) and Change of Speed (COS) into AIS-based predictions for more accurate results during maneuvers.
Uses radio waves to track the relative bearing and range of nearby targets.
The direction of the target's movement relative to the own ship. Ocean CPA method.pdf
The is the estimated position where the distance between two ships (the "own ship" and a "target vessel") reaches its absolute minimum. It is the primary metric used by Watchkeeping Officers to assess the Risk of Collision (ROC) . If the CPA is too small, a collision is possible, requiring immediate maneuvering according to COLREGs . 2. Core Parameters The method relies on two primary mathematical outputs:
Defining a "safe zone" around a ship rather than a single point. Incorporating Rate of Turn (ROT) and Change of
More details on reliability in CPA calculations
Recent research, such as that found on ScienceDirect and ResearchGate , suggests improving basic CPA by: The is the estimated position where the distance
Modern "Ocean CPA" calculations typically integrate data from two primary systems: