Additional maps, About gps satellite signals, Extras and optional accessories – Garmin GPSMAP 640 User Manual
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GPSMAP 620 and GPSMAP 640 Owner’s Manual
Appendix
Water Immersion
The unit is waterproof to IEC Standard 60529 IPX7. It can
withstand immersion in 1 meter of water for 30 minutes. Prolonged
submersion can cause damage to the unit. After submersion, be
certain to wipe and air dry the unit before reuse.
Avoiding Theft
• To avoid theft, remove the unit and mount from sight when not
in use.
• Do not keep your unit in the glove compartment.
• Register your product at
.
Additional Maps
You can purchase additional MapSource map data from Garmin
and load the maps in your GPSMAP 620 or GPSMAP 640 internal
memory or on an optional memory card.
To determine the versions of the maps that are loaded on your
device, open the Menu page. Touch
tools
>
Settings
>
Map
>
Map info
. Check
to see if
an update for your map software is available. To enable additional
maps, you need your unit ID (
page 65
) and serial number (located
near the power connector).
To load maps or waypoints in your device memory or on
your memory card, select the name for your GPSMAP 620 or
GPSMAP 640 drive or memory card drive. Refer to the MapSource
Help file for more information.
About GPS Satellite Signals
Your GPSMAP 620 or GPSMAP 640 must acquire GPS satellite
signals in order to navigate. If you are indoors, near tall buildings
or trees, or in a parking garage, your device may not acquire
satellites. Go outside to an area free from tall obstructions to use
your device.
When your GPSMAP 620 or GPSMAP 640 has acquired satellite
signals, the signal strength bars on the Home screen (or Menu
page) are green. When it loses satellite signals, the bars turn red or
clear.
For more information about GPS, go to
Extras and Optional Accessories
www.garmin.com/extras
, or contact your Garmin
dealer.