Section 12 Setting up Alerts 12-2
12.2 Collision Avoidance Alert Generation
Conditions
[Operation procedure]
Open the [Collision Avoidance] dialogue by performing the following menu operations.
[Menu] button → Alert → Collision Avoidance
In this dialogue, the collision detection condition (CPA/TCPA limit) and the AIS target status, which is
the target of alert detection, can be set.
For the details of CPA/TCPA, refer to "6.2 Collision Avoidance Issue (Explanation)".
Memo
As for the values of collision detection conditions, please specify the optimal values according to
the ship type, sea area, weather and marine conditions. (For the condition and type of each alert,
refer to "6.7 Alert Display".)
12.2.1 Setting the CPA/TCPA limit values
1 Enter the value of [CPA Limit] in a range from 0.1 NM to 9.9 NM.
2 Enter the value of [TCPA Limit] in a range from 1 min to 99 min.
12.2.2 Setting the status of the AIS/TT target that is
targeted for lost warning
1 Select a target for detecting a lost warning of the AIS/TT target from the [Lost Warning]
combo box.
TT & Activated AIS : Tracking inner TT targets excluding initial acquisition targets and
activated AIS targets (including danger targets and numeric value display
targets) are included.
Danger : Danger targets are included.
Off : Lost warnings are not generated.
Memo
• Lost warnings for sleeping AIS targets will not be generated.
• The following message is displayed in the alert status area when [Off] is set.
2 Setting a target for detection limit of the AIS/TT target from the [Lost Detection Limit]
input box
3 Select a target for detecting a CPA/TCPA alarm of the AIS target from the [AIS CPA/TCPA
Alarm] combo box.
ACT & Sleep : Activated AIS targets and sleeping AIS targets are included.
ACT : Activated AIS targets are included.
Off : CPA/TCPA alarms are not generated.
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