10.1 AIS Overview
When an AIS receiver/transceiver is connected
to your system, the AIS feature enables you to
receive information broadcast by other AIS equipped
vessels, and to view these vessels as targets
relative to your boat. The AIS feature on the unit is
standalone, settings and alarms cannot be shared
with other AIS enabled products on your system.
How AIS Works
AIS uses digital radio signals to broadcast ‘real-time’
information between vessels and shore-based
stations via dedicated VHF radio frequencies. This
information is used to identify and track vessels in
the surrounding area and to provide fast, automatic
and accurate collision avoidance data.
Note:
It is not mandatory for vessels to be fitted
with operational AIS equipment. Therefore, you
should not assume that ALL vessels in your area
are displayed.
With an optional AIS unit connected to your system
you can:
• Display targets for any other AIS-equipped
vessels.
• Display voyage information being broadcast by
these targets, such as their position, course,
speed and rate-of-turn.
• Display basic or detailed information for each
target vessel, including safety-critical target data.
• Set up a safe zone around your vessel.
• View AIS alarm and safety-related messages.
AIS information is displayed on the screen as shown
below:
Item
Description
1
AIS text
See AIS messages in table
below
2
AIS target
3
Dangerous targets alarm on
4
Heading line
5
COG line
6
Dangerous targets alarm off
Note:
Where unstable or no heading or COG data
is available AIS targets and your vessel icon will
not be displayed.
AIS Messages
AIS Messages
Description
AIS off
AIS Unit off
(none)
AIS is on and transmitting
Alarm on icon
AIS on, transmitting, alarm is
active.
Silent
AIS on & user is silent to
other vessels.
Alarm on
AIS on, user is silent to other
vessels & alarm is active.
Alarm off icon
AIS on & Alarm off
Data lost
AIS on & data lost.
No fix
AIS on & lost GPS fix.
Insufficient COG/Hdg data
No stable COG or heading
data
AIS-equipped vessels in the surrounding area are
displayed on the page as targets. A maximum of 25
targets can be displayed, where more than 25 targets
are in range
Max targets
is displayed onscreen.
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