1From a Radar screen, select Menu > Radar Menu > Other Vessels > AIS & MARPA List > Show.
2Select the type of threats to include in the list.
Showing AIS Vessels on the Radar Screen
AIS requires the use of an external AIS device and active transponder signals from other vessels.
You can configure how other vessels appear on the Radar screen. If any setting (except the AIS display range) is configured for one radar mode, the setting is applied to every other radar mode. The details and projected heading settings configured for one radar mode are applied to every other radar mode and to the Radar overlay.
1From a Radar screen or the Radar overlay, select Menu > Radar Menu > Other Vessels > Display Setup.
2Select an option:
•To indicate the distance from your location within which AIS vessels appear, select Display Range, and select a distance.
•To show details about
•To set the projected heading time for
VRM and EBL
The variable range marker (VRM) and the electronic bearing line (EBL) measure the distance and bearing from your boat to a target object. On the Radar screen, the VRM appears as a circle that is centered on the present location of your boat, and the EBL appears as a line that begins at the present location of your boat and intersects the VRM. The point of intersection is the target of the VRM and the EBL.
Showing the VRM and the EBL
The VRM and the EBL configured for one mode are applied to other radar modes.
NOTE: The VRM and the EBL cannot be changed in sentry mode.
From a Radar screen, select Menu > Radar Menu > Show VRM/EBL.
Adjusting the VRM and the EBL
Before you can adjust the VRM and the EBL, you must show them on the Radar screen (Showing the VRM and the EBL).
You can adjust the diameter of the VRM and the angle of the EBL, which moves the intersection point of the VRM and the EBL. The VRM and the EBL configured for one mode are applied to all other radar modes.
1From a Radar screen, select a new location for the intersection point of the VRM and the EBL.
2Select Drop VRM/EBL.
3 Select Stop Pointing.
Measuring the Range and Bearing to a Target Object Before you can adjust the VRM and the EBL, you must show them on the Radar screen (Showing the VRM and the EBL).
1From a Radar screen, select the target location.
2 Select Measure Distance.
The range and the bearing to the target location appear in the
When you connect your chartplotter to an optional Garmin marine radar, you can use the Radar overlay to overlay radar information on the Navigation chart or on the Fishing chart.
The Radar overlay superimposes radar information on the Navigation chart or the Fishing chart. Data appears on the Radar overlay based on the most recently used radar mode
(such as Harbor, Offshore, or Sentry), and all settings configurations applied to the Radar overlay are also applied to the
Radar Overlay and Chart Data Alignment
When using the Radar overlay, the chartplotter aligns radar data with chart data based on the boat heading, which is based by default on data from a magnetic heading sensor connected using a NMEA 0183 or NMEA 2000 network. If a heading sensor is not available, the boat heading is based on GPS tracking data.
GPS tracking data indicates the direction in which the boat is moving, not the direction in which the boat is pointing. If the boat is drifting backward or sideways due to a current or wind, the Radar overlay may not perfectly align with the chart data. This situation should be avoided by using
If the boat heading is based on data from a magnetic heading sensor or an automatic pilot, the heading data could be compromised due to incorrect setup, mechanical malfunction, magnetic interference, or other factors. If the heading data is compromised, the Radar overlay may not align perfectly with the chart data.
Showing the Radar Overlay
The Radar overlay displays data based on the most recently used radar mode.
From a Radar screen, select Menu > Radar Menu > Change Radar > Radar Overlay.
The radar picture appears in orange and overlays the Navigation chart.
Stopping the Transmission of Radar SignalsFrom a Radar screen, select Menu > Radar Menu > Radar to Standby.
TIP: Press 
from any screen to quickly stop radar transmission.
You can adjust the radar display settings for reduced clutter and increased accuracy.
NOTE: You can optimize the radar display for each radar mode.
1Select a radar range (Adjusting the Radar Range).
2Restore the default value of the gain setting (Adjusting Gain on the Radar Screen Automatically).
3Adjust the gain setting manually (Adjusting Gain on the Radar Screen Manually).
Radar Gain and Clutter
Adjusting Gain on the Radar Screen Automatically
The automatic gain setting for each radar mode is optimized for that mode, and may differ from the automatic gain setting used for another mode.
NOTE: Depending upon the radar in use, the gain setting configured for use in one radar mode may or may not be applied to other radar modes or to the Radar overlay.
NOTE: Not all options and settings are available on all radar and chartplotter models.
1From a Radar screen or the Radar overlay, select Menu > Radar Menu > Gain.
2Select an available option:
• Select Auto.
18 | Radar |