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:

Modern "Ocean CPA" calculations typically integrate data from two primary systems: Ocean CPA method.pdf

Provides GPS-based data including SOG (Speed Over Ground) and COG (Course Over Ground). 4. Calculation Methodology The is the estimated position where the distance

The direction of the target's movement relative to the own ship. a collision is possible