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174 C-Series Display Reference Manual
MARPA and AIS options
Safety messages
When the status of the AIS Safety Messages function is set to ON in the AIS Layer Setup
Menu (see
page 176
), 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 lat/lon.
You now have the option to:
• Remove the message (ACKNOWLEDGE)
• Place a waypoint on your chart/radar to mark the sending vessel’s position.
• Select to GOTO the sending vessel’s position.
Note: When the simulator is operating you will not be able to receive any safety mes-
sages.
11.7AIS Alarms
In addition to the dangerous target alarm previously described, the system generates
an alarm when a dangerous target becomes a lost target i.e. its signal has not been
received for 20 seconds.
Your AIS receiver generates local alarms which are displayed and sounded on your C-
Series display whenever an alarm condition exists on the unit.
Parameter Options
(Default in bold)
Vector Length
The time period specified for drawing length of vectors.
0.5min, 1 min, 3 min, 6min, 12min, 30
min, 60 min
Target History
Plots a MARPA target’s previous position at specified
intervals. The four most recent position points are dis-
played. If True target vectors are selected, the four most
recent vessel position points are also displayed.
OFF, 0.5 min, 1 min, 3 min, 6 min
Own vessel safe zone
The safe zone is a ring, centred on your boat, within which
a target is considered dangerous if it comes within a spec-
ified distance (CPA).
0.1 nm, 0.2nm, 0.5nm, 1.0 nm, 2.0nm
Time to safe zone
If a target enters your safe zone within this time period, it
is considered dangerous.
3 mins, 6 mins, 12 mins, 24 mins
Safe zone ring
Controls whether the safe zone ring is displayed or hidden
on screen
Visible
Hidden
81221_4.book Page 174 Tuesday, February 28, 2006 5:24 PM