JRC JMR-9225-9X3 - Setting the Vector Length; Setting Collision Decision Criteria; Setting CPA Limit

Section 6 Target Tracking and AIS 6-18
6.4.2.4 Setting the Vector Length
The Vector Length is set in min in the range from 1 min to 120 min.
1 Click on the Vector Length input box in the other ship information window.
2 Enter the Vector Length.
6.4.3 Setting collision decision criteria
Collision decision criteria are set based on CPA and TCPA.
For an outline of CPA and TCPA, refer to "6.2.3 Basic Concept of Collision Avoidance."
Note
Set the optimum values of collision decision conditions, with consideration for vessel type, water
area, weather and oceanographic conditions.
For the relations between those conditions and alarms, refer to "6.7 Alert Display".
6.4.3.1 Setting CPA limit
1
Click on the CPA limit value input box in the other ship information window.
Set the CPA limit in the unit of 0.1 NM within the range from 0.1 NM to 9.9 NM.
2 Enter the CPA limit.
CPA limit value input box
Vector Length input box