Raymarine GPM400 Reference Manual page 65

• 'Sync' is indicated in the top left-hand corner of the chart
window.
• If you change the radar range in any radar window, all synchro-
nized chart views change scale to match.
• If you change the scale of a chart window, all radar windows
change range to match.
To set radar range synchronization
1. Press the PRESENTATION softkey.
2. Press the CHART MODE AND ORIENTATION softkey.
3. Select the appropriate synchronization mode on the CHART
SYNC softkey.
Note: Radar range synchronization is not available when the chart
motion mode is set to Autorange. The chart can be synchro-
nized with either the 3D chart or the radar but not both. You
cannot sync with radar if dual range is enabled in the radar
application.
Viewing MARPA targets on the chart
The Mini Automatic Radar Plotting Aid (MARPA) function is used
for target tracking and risk analysis. Although set up in radar mode
or radar overlay, all MARPA targets are displayed in the chart win-
dow, from which you can also access MARPA functions.
For detailed information about MARPA, see
To access MARPA controls from the chart application
1. Highlight a MARPA target with the cursor.
or
1. If radar overlay is switched on, press the RADAR OPTIONS
softkey.
2. Press the TARGET TRACKING softkey.
Radar options:
• Target tracking
• Gain
• Target display
• Change range (using the Range button)
Navigation options:
• Route
• Track
AIS
If you have an automatic identification system (AIS) fitted to your
vessel, you can use it to:
• Display the position of other craft which are appropriately en-
abled with AIS.
• Display broadcast AIS information from appropriately-equipped
vessels including position, course, speed, rate of turn and other
safety-critical data.
• Set up a safe zone around your vessel.
• Receive AIS alarms and safety-related messages.
This information is displayed in an overlay. Additional data, when
available, is displayed in a dialog box.
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Chapter 5: The Chart Application