Ais Distress Signal Device Targeting Symbols; Enabling Ais Transmission Test Alerts; Turning Off Ais Reception; Chart Menu - Garmin GPSMAP 7400 Series Owner's Manual

AIS Distress Signal Device Targeting Symbols

Symbol Description
AIS distress signal device transmission. Select to see more information about the transmission and
begin navigation.
Transmission lost.
Transmission test. Appears when a vessel initiates a test of their distress signal device, and does not
represent a true emergency.
Transmission test lost.

Enabling AIS Transmission Test Alerts

To avoid a large number of test alerts and symbols in crowded areas such as marinas, you can select to receive
or ignore AIS test messages. To test an AIS emergency device, you must enable the chartplotter to receive test
alerts.
1 Select Settings > Alarms > AIS.
2 Select an option:
• To receive or ignore Emergency Position Indicating Radio Beacon (EPRIB) test signals, select AIS-EPIRB
Test.
• To receive or ignore Man Overboard (MOB) test signals, select AIS-MOB Test.
• To receive or ignore Search and Rescue Transponder (SART) test signals, select AIS-SART Test.

Turning Off AIS Reception

AIS signal reception is turned on by default.
Select Settings > Other Vessels > AIS > Off.
All AIS functionality on all charts and 3D chart views is disabled. This includes AIS vessel targeting and
tracking, collision alarms that result from AIS vessel targeting and tracking, and the display of information
about AIS vessels.

Chart Menu

NOTE: Not all settings apply to all charts. Some options require premium maps or connected accessories, such
as radar.
NOTE: The menus may contain some settings that are not supported by your installed charts or your present
location. If you make changes to those settings, the changes will not impact the chart view.
From a chart, select Menu.
Layers: Adjusts the appearance of the different items on the charts
Quickdraw Contours: Turns on bottom contour drawing, and allows you to create fishing map labels
Quickdraw Contours Mapping,
Settings: Adjusts the chart settings
Edit Overlays: Adjusts the data shown on the screen
Charts and 3D Chart Views
page 37).
(Chart Settings, page 36).
(Customizing the Data Overlays,
(Chart Layers, page 32).
page 12).
(Garmin
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