heading data is compromised, the Radar overlay may not
align perfectly with the chart data.
Transmitting Radar Signals
NOTE:
As a safety feature, the radar enters standby mode
after it warms up. This gives you an opportunity to verify
the area around the radar is clear before beginning radar
transmission.
1
With the chartplotter off, connect your radar as
described in the radar installation instructions.
2
Turn on the chartplotter.
If necessary, the radar warms up and a countdown
alerts you when the radar is ready.
3
Select
Radar
.
4
Select a radar mode.
A countdown message appears while the radar is
starting up.
5
Select
Options
>
Transmit Radar
.
Stopping the Transmission of Radar Signals
From a radar screen, select
Options
>
Radar To
Standby
.
TIP:
Press >
Radar To Standby
from any screen to
quickly stop radar transmission.
Setting Up the Timed Transmit Mode
To help conserve power, you can set up time intervals in
which the radar will transmit and not transmit (standby)
signal transmissions.
NOTE:
This feature is not available in dual radar modes.
1
From a radar screen, select
Options
>
Radar Options
>
Timed Transmit
.
2
Select
Timed Transmit
to enable the option.
3
Select
Stdby Time
, enter the time interval between
radar signal transmissions, and select
Done
.
4
Select
Transmit Time
, enter the duration of each radar
signal transmission, and select
Done
.
Enabling and Adjusting a Radar No Transmit Zone
You can indicate areas within which the radar scanner
does not transmit signals.
NOTE:
GMR Fantom and xHD2 radar models support two
no-transmit zones. Most other GMR radar models support
one no-transmit zone. GMR 18 HD+ radar models do not
support no-transmit zones.
1
From a radar screen, select
Options
>
Radar Setup
>
Installation
>
No Transmit Zone
.
The no-transmit zone is indicated by a shaded area on
the radar screen.
2
Select
Angle 1
, and select the new location for the first
angle.
3
Select
Angle 2
, and select the new location for the
second angle.
4
Select
Done
.
5
If necessary, repeat for the second zone.
Adjusting the Radar Range
The range of the radar signal indicates the length of the
pulsed signal transmitted and received by the radar. As
the range increases, the radar transmits longer pulses in
order to reach distant targets. Closer targets, especially
rain and waves, also reflect the longer pulses, which
can add noise to the Radar screen. Viewing information
about longer-range targets can also decrease the amount
of space available on the Radar screen for viewing
information about shorter-range targets.
• Select
to decrease the range.
• Select
to increase the range.
Tips for Selecting a Radar Range
• Determine what information you need to see on the
Radar screen.
For example, do you need information about nearby
weather conditions or targets and traffic, or are you
more concerned about distant weather conditions?
• Assess the environmental conditions where the radar is
being used.
Especially in inclement weather, longer-range radar
signals can increase the clutter on the Radar screen
and make it more difficult to view information about
shorter-range targets. In rain, shorter-range radar
signals can enable you to view information about
nearby objects more effectively, if the rain clutter setting
is configured optimally.
• Select the shortest effective range, given your
reason for using radar and the present environmental
conditions.
MotionScope
™
Doppler Radar Technology
The GMR Fantom radar uses the Doppler effect to
detect and highlight moving targets to help you avoid
potential collisions, find flocks of birds, and track weather
formations. The Doppler effect is the frequency shift in the
radar echo due to the relative motion of the target. This
allows for instant detection of any targets moving toward
or away from the radar.
The MotionScope feature highlights the moving targets on
the radar display so you can navigate around other boats
or severe weather, or toward fishing spots where birds are
feeding at the surface.
The moving targets are color-coded so you can tell at
a glance which targets are moving toward or away from
you. On most color schemes, green indicates the target
is moving away from you and red indicates the target is
moving toward you.
On some models, you can also adjust the M-Scope
Sensitivity setting to change the speed threshold for target
highlighting. A higher setting highlights slower targets, and
a lower setting highlights only faster targets.
Radar
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