• Chart application with only the Radar overlay
enabled: Menu > Radar > AIS Options > Display
AIS:
• Chart application with only the AIS overlay
enabled: Menu > AIS > AIS Options > Display
AIS:
1. Select Display AIS: so that Dangerous is
selected.
Only Dangerous AIS targets will be displayed.
2. Select Display AIS: so that All is selected.
All AIS targets in range will be displayed.
12.9 Collision Avoidance
The Chart application provides features to help
improve collision awareness. The Target interception
feature tracks AIS targets in relation to your own
vessel’s Course Over Ground (COG) and Speed
Over Ground (SOG). Target interception zones
indicate areas where there is an increased risk of
collision. Zones are based on your current speed
and AIS data received from targets and can help you
determine whether you should change course and
/ or speed to avoid danger. The Target interception
graphics automatically refresh when new position
data for the target or your own vessel is received
by the system.
1. Target interception zone (Predicted area of
danger based on target’s last reported position.)
2. Target COG line
3. AIS Target (Last received position)
Important: You must still maintain a permanent
watch for:
• vessels that are not equipped with AIS or
AIS equipped vessels that are not currently
transmitting their position, as these targets will
not be displayed in the Chart application.
• AIS equipped vessels reporting an inaccurate
GPS position or your own vessels GPS accuracy,
as this will cause your vessel’s position and / or
AIS target positions to be displayed inaccurately
in the Chart application.
There are 3 potential scenarios:
• Own vessel moving faster than target
• Target moving faster than own vessel
• Both targets moving at similar speed
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