Ocean Cpa Method.pdf 【FAST – Solution】

Incorporating Rate of Turn (ROT) and Change of Speed (COS) into AIS-based predictions for more accurate results during maneuvers.

The direction of the target's movement relative to the own ship. Ocean CPA method.pdf

The CPA is traditionally calculated using vector geometry. Determine Relative Velocity ( Vrcap V sub r Incorporating Rate of Turn (ROT) and Change of

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: Determine Relative Velocity ( Vrcap V sub r

More details on reliability in CPA calculations

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