GMR 20/40 Owner’s Manual
1
GMR 20/40 O
PERATION
Radar Overview
The Garmin GMR 20/40 Radar Scanner transmits a narrow beam of
microwave energy in a rotating 360° pattern. When the transmitted
energy contacts a target, some of that energy is reflected and returned
to the scanner. The scanner collects the returned energy for processing
and display. The GMR 20/40 is operated and adjusted using the
controls on your Gamin chartplotter. Radar data is presented on a
dedicated Radar page, or as an overlay on the Map page. All radar
controls are accessible on both pages.
The Radar Page
With the GMR 20/40 Radar properly installed, at power up, the
Garmin chartplotter should detect the GMR 20/40 as a new network
connection.
Note:
A software update may be needed for the GMR 20/40
to function properly. If the message “Incompatible Software
Version” is displayed when the chartplotter is powered on, the
software in the chartplotter needs to be updated. A software
update card is provided with the GMR 20/40.
When the new radar is detected, the chartplotter automatically adds
a dedicated Radar page to the page list. If the Radar page is not
available, press and hold the
ADJ/MENU
key until the Main Menu is
displayed. Using the
ARROW KEYPAD
, highlight the
System
tab,
and select
Radar
from the Services list at the bottom of the page.
To Select the Radar page for display:
1. Press the
PAGE
key to display the Pages list.
2. Using the
ARROW KEYPAD,
select
Radar
.
3. Press the
ENTER
key.
Pages List
GMR 20/40 O
PERATION
>
R
ADAR
O
VERVIEW
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R
ADAR
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Summary of Contents for GMR 20
Page 1: ...GMR 20 40 Marine Radar Owner s Manual...
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