Ais Overview - Raymarine a67 Wi-Fi Installation And Operation Instructions Manual

13.1 AIS overview

The AIS feature enables you to receive information broadcast by
other vessels, and to add these vessels as targets in the chart
and radar applications.
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.
• Add AIS-equipped friends and regular contacts to a "Buddy
List"
AIS information is displayed in the form of an overlay in the chart
and radar applications. Additional data is displayed in a dialog
box, for example:
1 2
Item
1
2
3
4
5
6
7
AIS-equipped vessels in the surrounding area are displayed
in the chart or radar application as triangular targets. Up to
100 targets are displayed. As the vessel's status changes, the
symbol for the target changes accordingly.
Vectors can be displayed for each target. These vectors indicate
the vessels direction of travel and the distance it will travel
over a specified period of time (COG / SOG vector). Targets
displayed with their vectors are referred to as 'active targets' and
are scaled according to the size of the vessel. The larger the
vessel, the larger the target. You can either display all targets or
just dangerous targets.
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. The AIS features
complement the radar application, as AIS can operate in radar
blind spots and can detect smaller vessels equipped with AIS.
Note: It may not be mandatory for vessels to be fitted with
operational AIS equipment. Therefore, you should not assume
that your multifunction display will show ALL vessels in your
area. Due prudence and judgement should be exercised. AIS
should be used to complement radar, NOT substitute it.
118
3 4 5 6 7
097°T
11. 6 kt
1 . 2 37n m
00h 04m 33s
Description
Dangerous target (flashes).
Safe zone (defined by distance and
/ or time).
AIS target vessel.
Heading.
Direction of turn.
COG/SOG vector.
Safety critical data.
AIS Simulator Mode
Raymarine recommends that you use the simulator function to
familiarize yourself with the AIS features. When the simulator
function is enabled (homescreen > Set-up > System Settings
> Simulator), it displays 20 AIS targets within a 25 nm range.
These targets are displayed using the appropriate AIS target's
status symbol, and move around the screen as if they were real
targets.
Note: Incoming safety messages are NOT displayed while
the simulator is enabled.
D12220-1
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