Ocean Cpa Method.pdf -

The minimum distance (usually in nautical miles) between the vessels at the moment of closest approach.

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: Ocean CPA method.pdf

Incorporating Rate of Turn (ROT) and Change of Speed (COS) into AIS-based predictions for more accurate results during maneuvers. The minimum distance (usually in nautical miles) between

Defining a "safe zone" around a ship rather than a single point. a collision is possible