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Unit Overview
The GPSMAP 378/478 is an all-in-one, versatile color chartplotter and automobile navigator—perfect for land or water. This portable GPS
navigator features a 256-color TFT display that is easy to read in bright sun and includes built-in g2 cartography (GPSMAP 478) or built-in
lake cartography (GPSMAP 378), and preloaded City Navigator NT
®
to provide you with automatically generated turn-by-turn directions.
With the optional GXM 30 antenna and a subscription to XM WX Satellite Weather, users have constant access to NEXRAD radar, lightning,
wind speed, wave direction, and more. In addition, the GPSMAP 378/478 offers XM Satellite Radio capabilities featuring more than 160
digital channels of commercial-free music; more than 30 channels of news, sports, talk, and entertainment; and more than 20 dedicated
channels of XM Instant Trafc & Weather.
External power
connector under
weather cap
USB/GXM 30
antenna connector
under weather cap
Slot for optional data card
Battery pack. Press tab down
to remove battery pack for
replacement, if necessary.
Backlit keypad for easy nighttime operation
GPS antenna
256-Color TFT display
with backlighting
Detachable GPS antenna
collapses for storage.
Be sure the antenna is
up (as shown here)
to receive satellite
signals. See the
“Appendix”,
page 122, for
instructions on
removing the
antenna.
Serial number
Headphone/stereo jack
under weather cap
GPSMAP 378/478 Owner’s Manual 1
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