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.
1
From a Radar screen, select a new location for the
intersection point of the VRM and the EBL.
2
Select
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).
1
From a Radar screen, select the target location.
2
Select
Measure Distance
.
The range and the bearing to the target location appear in
the upper-left corner of the screen.
Radar Overlay
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 last-used radar mode. For example, if you use Harbor mode
and then you switch to the Radar overlay, the Radar overlay
would show Harbor mode radar data. If you changed the gain
setting using the Radar overlay menu, the gain setting for
Harbor mode would change automatically.
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 boat-heading data from an
electronic compass.
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.
Select
Charts
>
Radar Overlay
.
The radar picture appears in orange and overlays the
navigation chart.
Setting a Custom Park Position
If you have more than one radar on your boat, you must be
viewing the radar screen for the radar you want to adjust.
By default, the antenna is stopped perpendicular to the pedestal
when it is not spinning. You can adjust this position.
1
From the radar screen, select
Menu
>
Radar Setup
>
Antenna Configuration
>
Park Position
.
2
Use the slider bar to adjust the position of the antenna when
stopped, and select
Back
.
Enabling and Adjusting a Radar No Transmit
Zone
You can indicate an area within which the radar scanner does
not transmit signals.
NOTE:
This feature is not available on all radar and chartplotter
models.
1
From a radar screen, select
Menu
>
Radar Setup
>
Enable
No Transmit Zone
.
The no-transmit zone is indicated by a shaded area on the
radar screen.
2
Select
Adjust No Transmit Zone
>
Move No Transmit
Zone
.
3
Select
Angle 1
, and select the new location for the first
angle.
4
Select
Angle 2
, and select the new location for the second
angle.
5
Select
Done
.
Stopping the Transmission of Radar Signals
From a radar screen, select
Menu
>
Radar To Standby
.
TIP:
Press from any screen to quickly stop radar
transmission.
Optimizing the Radar Display
You can adjust the radar display settings for reduced clutter and
increased accuracy.
NOTE:
You can optimize the radar display for each radar mode.
1
Select a radar range (Adjusting the Radar Range).
2
Restore the default value of the gain setting (Adjusting Gain
on the Radar Screen Automatically).
3
Adjust 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.
1
From a radar screen or the radar overlay, select
Menu
>
Gain
.
2
Select an applicable option for the connected radar:
• To set the gain automatically once, based on average
conditions, the range of the radar signal, and the selected
radar mode, select
Auto
.
The chartplotter does not adjust the gain automatically in
response to changing conditions.
• To adjust the gain automatically for changing conditions,
select
Auto Low
or
Auto High
.
• To adjust the gain automatically to show birds over the
surface of the water, select
Auto Bird
.
Adjusting Gain on the Radar Screen Manually
For optimal radar performance, you can manually adjust the
gain.
Radar
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