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GARMIN GPSMAP76s Firmware Upgrades

Firmware: V4.00 - V3.90 - V3.70 - V3.60 - V3.50 - V3.40 - V3.30 - V3.21 - V3.20 - V3.10 - V2.01

The following lists of changes are based on information provided by GARMIN. Changes or improvements which we consider important or especially useful are shown highlighted.

To view the current firmware version, complete the following steps:

  1. Press the Menu key twice to access the main menu.
  2. Select "System Information" and press the ENTER key.
  3. The current firmware version will be displayed on the screen.
  4. Press the ENTER key to quit the screen.

Each upgrade replaces the complete firmware in the GPS, which means you need to install only the version you wish to apply. There is no need to install any previous versions.


Changes made from version 3.90 to 4.00: (released 06/07/2006)

  1. Fixed NMEA sentence HCHDG to show magnetic heading correctly when user has selected magnetic north reference.

Firmware Upgrade V4.00 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.8 MB)

To table of contents


Changes made from version 3.70 to 3.90:

  1. Improve WAAS search and selection process.

Firmware Upgrade V3.90 (not available for download)

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Changes made from version 3.60 to 3.70: (released 02/25/2005)

  1. Fixed shutoff problem with certain European tides.

Firmware Upgrade V3.70 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.1 MB)

To table of contents


Changes made from version 3.50 to 3.60: (released 10/15/2003)

  1. Corrected problem with European tides.

Firmware Upgrade V3.60 (Self-extracting ZIP-file, requires a PC and a connection cable, 981 kB)

To table of contents


Changes made from version 3.40 to 3.50: (released 09/22/2003)

  1. Improved non-volatile memory storage of WAAS/EGNOS ionospheric mask corrections.
  2. Reduced delays in acquiring a position when using differential GPS.
  3. Added Canadian tide support.

Firmware Upgrade V3.50 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 3.30 to 3.40: (released 09/05/2003)

  1. French translation update.
  2. Added the option to turn off the recording of track points and vertical trip computer data by virtually turning off the altimeter. An altimeter status (on/off) determines when it is okay to save track points due to altitude changes and when to update the vertical trip computer.

Firmware Upgrade V3.40 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 3.21 to 3.30: (released 07/30/2003)

  1. Fixed bug introduced in last release. Exit information was not being displayed properly.
  2. Added updated support for RCV_CPO data.
  3. Fixed problem with changing elevation units. Users are now able to change to meters without having to restart the unit.
  4. Improved WAAS/EGNOS satellite selection algorithm to select the satellite with the most beneficial corrections given the unit's current position. A unit will not use a WAAS/EGNOS satellite if the unit's current position is outside of a given WAAS/EGNOS satellite's service volume.
  5. Added new 'Distance and Speed' unit. The new unit is 'Nautical (nm, kt, m)'. The old 'Nautical' is now 'Nautical (nm, kt, ft)'. The new unit is the same as the old, except it shows the small measurements in meters instead of feet.
  6. New French translations.

Firmware Upgrade V3.30 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 3.20 to 3.21: (released 06/03/2003)

  1. Added tide support for European and Australian tides version 5.0.
  2. Added support for RCV_CPO data.

Firmware Upgrade V3.21 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 3.10 to 3.20: (released 02/21/2003)

  1. Restored transmission of GSV NMEA sentences in full for every two-second update.
  2. Corrected display of available route waypoints on the Route Setup Map page.

Firmware Upgrade V3.20 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 2.01 to 3.10: (released 02/10/2003)

  1. Increased active track log to 10,000 points.
  2. Increased saved track log to 750 points.
  3. Increased user waypoints to 1,000 waypoints.
  4. Improved various translations.
  5. Added EOV Hungarian and South African grid support.
  6. Added functionality to start, stop, or resume navigation from the Route Detail page's option menu.
  7. Corrected Canadian MetroGuide information to not display EURO.
  8. Corrected potential shutoff on Elevation Plot page.
  9. Improved glide ratio to calculate all the time, not just when navigating a route.
  10. Corrected problem where 'Hold Level' could not be removed when using user north settings.
  11. Added depth labels for Isolate Danger Depths in BlueChart maps.
  12. Corrected problem where track log would connect last known position before powerdown to first known position at powerup.

Important notes:

  • Reverting back to previously released versions will clear user memory.
  • Users are strongly urged to backup any user data they wish to save.
  • WARNING: If your current software version is less than 3.01 Beta, this software will clear all unit data including alamanac information. Backup all user data before upgrading.
  • After installation is complete, place unit with a clear view of the sky for 15-30 minutes to re-acquire almanac data.

Firmware Upgrade V3.10 (Self-extracting ZIP-file, requires a PC and a connection cable, 1.0 MB)

To table of contents


Changes made from version 2.00 to 2.01: (released 07/12/2002)

  1. Eliminated possible shutoffs when repeatedly finding Cities or Points of Interest.
  2. Eliminated possibly storing bad data when starting a Goto, which would cause the unit to shut off and would prevent the unit from turning on again.
  3. Eliminated possible shutoffs and lockups when selecting a street for finding addresses or intersections using newer maps.
  4. Corrected HCHDG NMEA sentence to output magnetic heading rather than true heading.
  5. Added a Setup Routes item to the Routes main menu page which allows setting the route waypoint transitions to Manual. When set to Manual, routes will transition to the next waypoint only when instructed to do so by the user.
  6. Added a Setup NMEA output item to the Interface setup page menu when the Serial Data Format is set to NMEA. This allows setting the following for the NMEA output: the precision of the minutes field for lat/lon, the waypoint identifier format, and which groups of sentences to transmit. These settings allow compatibility with a wider range of NMEA-driven products including some older marine autopilots.
  7. Made vertical speed more responsive when a 3D location is available.
  8. Improved the plot page: quickened response to Page key, Quit key, and new plot data; added a current data value indicator; allowed the cursor to wrap left/right when panning.
  9. Added Location (both chosen & default formats) as choices for Medium and Large configurable fields.
  10. Added glide ratio, glide ratio to target, and vertical speed to target as choices for all configurable fields.
  11. Added a separate setup item for vertical speed units to the Units setup page, which allows the vertical speed units to be ft/min, m/min, or m/sec independent of the Altitude units.
  12. Added receiving water depth through DBT NMEA input sentence.
  13. Added new Point of Interest types when supported by the map data.
  14. Allowed finding duplicately-named cities by name across multiple maps of the same type if supported by the map data.
  15. Continue to update trip computer and track log with elevation data when satellite reception is lost.
  16. Improved the accuracy of the estimated accuracy value.
  17. Prevented possible corruption of time in GARMIN output format.
  18. Removed creating user waypoints if the route waypoint memory is full when receiving routes from MapSource.

Firmware Upgrade V2.01 (Self-extracting ZIP-file, requires a PC and a connection cable, 1 MB)

To table of contents


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