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Gmr 20/40 operation, Radar overview, Gmr 20/40 o – Garmin GMR 20 User Manual

Page 5: The radar page

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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

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R

ADAR

O

VERVIEW

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ADAR

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