Reference Manual Part 2

161 Chapter 12: Automatic Identification System
AIS list
The AIS list provides collision-avoidance data for the highlighted
target:
To display the AIS List
1. Make a chart window active, with AIS Layer turned on.
1. Press the AIS OPTION softkey.
2. Press the TARGET TRACKING softkey.
3. Select AIS LIST.
Full AIS data
Full AIS data for an individual target includes static, dynamic and
voyage related data.
To view full AIS data for a target
1. Highlight the target with the cursor.
2. Press the VIEW FULL AIS DATA softkey.
or
1. Select the target on the AIS list.
2. Press the VIEW FULL AIS DATA softkey.
12.9 Safe zones
A safe zone is a circular area about your vessel. If another vessel
enters this area, the G-Series system considers it dangerous. The
perimeter of the zone is displayed on the radar and chart window
as a red ring.
The AIS safe zone uses the same criteria as MARPA and will deem
a target dangerous if it comes within a specified distance of your
vessel (closest point of approach, or CPA) within a specified time
(time to closest point of approach, or TCPA). The CPA and TCPA
are calculated using COG/SOG and position from the AIS target.
When the system recognizes a dangerous AIS target:
• The target symbol changes to red and flashes.
• An warning is displayed.
• An alarm sounds (if AIS alarm is enabled).
Safe zone alarm
You can disable the dangerous target alarm. Doing so will prevent
the visual warning from displaying and the audible alarm from
sounding, but dangerous targets are still displayed in red.
The AIS status icon shows the current status of AIS alarms.
The dangerous target alarm operates irrespective of the status of
the AIS target display or the status (VISIBLE/HIDDEN) of the safe
zone ring.
To set up an AIS safe zone
1. Press the TARGET TRACKING softkey.
2. Press the MARPA and AIS OPTIONS softkeys.
3. Select Own Vessel Safe Zone and set the radius of your safe
zone.
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