Using Ais To Avoid Collisions - Raymarine E Series User Reference Handbook

Displaying detailed AIS target information
In the chart or radar application:
1. In the chart application, select the AIS OPTIONS softkey (or
RADAR AND AIS softkey if Radar Overlay is ON).
2. In the radar application, select the TARGET TRACKING softkey.
3. Select the AIS LIST softkey.
4. Select the VIEW FULL AIS DATA softkey.
Note: You can also display full AIS information by moving the
cursor over the relevant target in the chart or radar application,
and selecting the VIEW FULL AIS DATA softkey.
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10.9 Using AIS to avoid collisions

You can use the AIS safe zone and safety message functions to
help you avoid collisions with other vessels and objects.
Safe Zones
A safe zone is a ring centred on your vessel within which a target
is considered dangerous. It is displayed in the radar or chart
applications as a red ring.
This 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 your system recognizes a dangerous AIS target:
• The target symbol changes to red and flashes.
• An alarm pop-up is displayed (this can be disabled if required).
• An alarm sounds (this can be disabled if required).
Note: When the AIS receiver is connected and functioning, the
system will check for dangerous targets within the safe zone
and if enabled issue an alarm whenever necessary. Dangerous
target alarm operates irrespective of the ON or OFF status of the
AIS target display, or the VISIBLE / HIDDEN status of the safe
zone ring.
Safety Messages
When the status of the AIS Safety Messages function is set to ON in
the Menu > AIS Layer Setup Menu, any incoming safety messages
from surrounding vessels, shore stations and mobile stations are
displayed in a pop-up box. If known, the message will include the
sending vessel's position in latitude / longitude. You will have the
option to:
• Remove the message (ACKNOWLEDGE).
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