Updates & Downloads
GPSMAP� 478
Update Unit Software with Garmin Express
Use Garmin Express to keep your device software up to date.
Additional Software
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USB Drivers, Ver. 2.3.1.2,
as of Oct 01, 2015,
Download
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xImage, Ver. 2.3,
as of Mar 23, 2005,
Download
Voice Guidance Languages
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Voice, GPSMAP 276C/278/296/378/478 (region file only), Ver. 2.20,
as of Oct 30, 2006,
Download
Unit Software
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GPSMAP 478, Ver. 4.50,
as of May 13, 2013,
Download