Chapter 10: AIS 113
AIS Target symbols
AIS target symbols are summarized below.
Viewing AIS information
You can display information relating to individual AIS targets.
To see AIS data for a selected target
1. Highlight the AIS target with the cursor.
2. Select the appropriate data from the toolbar.
10.4 Safe zones
A safe zone is a circular area created about your boat. If an AIS tar-
get (i.e a vessel transmitting AIS data) enters this area, your A-
Series will consider it as dangerous and sound an appropriate
alarm. The perimeter of the safe zone appears on-screen as a red
ring around your vessel icon.
The system controls the safe zone and considers a target danger-
ous if it comes within the specified perimeter of the safe zone using
the following criteria:
• CPA.
• TCPA.
When the system recognizes a dangerous AIS target:
• The target symbol changes to red and flashes.
• An on-screen warning is shown.
• An alarm sounds (if enabled in the setup menu).
To set up an AIS safe zone:
1. Press the TARGET TRACKING soft key.
2. Press the AIS OPTIONS soft key. The AIS options dialog box
appears.
3. Select the Own Vessel Safe Zone and set the radius of your
boat’s safe zone.
Safe zone alarm
The safe zone alarm is an audible warning that sounds when a tar-
get enters your vessel’s safe zone and becomes dangerous.
The safe zone alarm will sound irrespective of a targets status, dis-
play or the safe zone status. The current status of AIS alarms is
shown by the AIS icon in the data bar.
Uncertain target
Calculated CPA/TCPA value uncertain.
Sleeping target
Target not activated, dangerous or lost.
Activated target
Target activated i.e. AIS vector displayed.
Vector line (optional) shows predicted distance travelled within
given time.
Dangerous target
Targets within specified distance (CPA) or time (TCPA).
Dangerous target alarm sounds if en-abled.
Target flashes.
Lost target
When signal of dangerous target not received for 20 seconds.
Target in latest predicted position.
Alarms sounds if enabled.
Target flashes.
Selected target
Target selected with cursor.
Can activate the target and view detailed data.
COG/SOG
vector
Heading
Direction
of turn
AIS
D8523-1
81314-1_A Series Reference Guide.book Page 113 Thursday, August 28, 2008 9:23 AM
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