GPSMAP 4000 Series Owner’s Manual
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Using Radar
When you connect your chartplotter to an optional Garmin marine radar such as a GMR 404/406 or
a GMR 18/24, you can view more information about your surroundings. The radar connects through
the Garmin Marine Network and shares radar data with all networked chartplotters.
The Garmin Marine Radar transmits a narrow beam of microwave energy as it rotates in a 360
pattern. When the transmitted energy contacts a target, some of that energy is reflected back to the
radar.
WARNING:
The marine radar transmits microwave energy that has the potential to be harmful to
humans and animals. Before beginning radar transmission, verify that the area around the radar is clear.
The radar transmits a beam approximately 12° above and below a line extending horizontally from the
center of the radar. Avoid looking directly at the radar, because the eyes are the most susceptible part of
the body.
To turn on the radar:
1. When you power the network on, the radar warms up. A countdown is provided to alert you when
the radar is ready. From the Home screen, select
Radar > Cruising
.
As a safety feature, the radar enters standby mode after it warms up. This gives you an
opportunity to verify that the area around the scanner is clear before beginning radar
transmission. It is important to remember that the microwave energy transmitted by the scanner
can potentially be dangerous.
2. When the message “Ready to Transmit” appears, press
MENU
(or press and release the
Power
key).
3. On the lower-right portion of the screen, select
Transmit Radar
. A “Spinning Up” message
appears for a few moments, then the radar begins painting an image.
➋
➌
➊
To turn off the Radar:
Press
MENU
(or press and release the
Power
key) >
Go To Standby
.
