Updates & Downloads

GPSMAP 378 (region file only) software version 4.20

as of May 13, 2013

Use Garmin Express to install this file.

(5.46 MB)

View system requirements

Notes:

Please back up important data (routes, tracks, and waypoints) to MapSource prior to updating.
This update will also upgrade the software in your GXM30 antenna to version 2.30.
This update will also upgrade the software in your GXM40 antenna to version 2.30.
WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
If attempts to upload software fail, you may need to return the device to Garmin® for service.

Change History

Changes made from version 4.10 to 4.20:

Support for new 010-10517-02 battery pack

Changes made from version 4.00 to 4.10:

Improved data validation process for incoming XM/Sirius 'County Warning' data

Changes made from version 3.90 to 4.00:

Improved GPS satellite acquisition processing
Updated magnetic variation table with IGRF 2010 model

Changes made from version 3.80 to 3.90:

Added support for large NAND datacards
Improved power-up processing
Improved XM subscription activation processing

Changes made from version 3.60 to 3.80:

Improved XM weather data map display algorithm
Added support for GXM 40 antenna
Improved battery gauge accuracy

Changes made from version 3.50 to 3.60:

Improved XM data validation for XM subscribers with weather data only.

Changes made from version 3.40 to 3.50:

Improved compatibility with 512MB data card
Improved map display when both internal maps and maps on a data card are visible
Improved unit behavior when a blank data card is inserted
Improved display of battery charge level

Changes made from version 3.20 to 3.40:

Corrected address search operation with MPC maps.

Changes made from version 3.10 to 3.20:

Improved GPS satellite acquisition under certain conditions.

Changes made from version 3.00 to 3.10:

Corrected external voltage alarm persistent behavior between power cycles.
Corrected state and country information for city searches.

Changes made from version 2.90 to 3.00:

Improved NMEA output.
Added support for Canadian weather data.
Daylight saving changes for United States.
Added Mexican time zones.
Corrected address and postal code searches when a datacard is present.

Changes made from version 2.80 to 2.90:

Corrected 'persist' setting for external voltage alarm.
Improved ability to move user waypoints while editing a route.

Changes made from version 2.70 to 2.80:

Improved display of recommended route lines on marine charts.
Improved operation when moving user waypoints with the map cursor.
Corrected issue with changing usage mode from the Setup tab of the main menu.

Changes made from version 2.60 to 2.70:

Corrected issue that could cause 'WorldMap' series maps from being displayed.
Increased the number of characters allowed to display map zoom status.
Corrected text translations.
Clear trip data to correct issue with previously stored data.
Added Czech voice support.

Changes made from version 2.50 to 2.60:

Corrected issue that could cause the odometer field value to become inaccurate.
Corrected occasional unit shutdown during powerup.
Improved address search when using postal codes.

Changes made from version 2.40 to 2.50:

Changed distance displayed when measuring distance on the map page to use two digits of precision in marine mode.
Improved performance of Marine Services search.

Changes made from version 2.20 to 2.40:

Improved reception of weather data

Changes made from version 2.10 to 2.20:

Corrected map family name display.

Changes made from version 2.00 to 2.10:

Improved display of timestamp for winds and pressure data.
Improved display of lake depth contours.
Improved TracBack when using the entire track.
Improved GPS reception.

System requirements

IBM-compatible PC running Windows 2000 or later operating system and an available USB or Com 1, 2, 3, or 4 port.
PC Interface Cable for your GPS unit. The PC Interface Cable may be purchased through your local Garmin distributor or ordered direct from our Online Store.