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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. Turn on the GPS.
2. Switch to the settings page by rotating the rock'roll wheel to the tool symbol and then press the button in the center of the wheel.
3. Select "System".
4. Press the left soft key ("Options")
5. Select "Software Version".
6. The system will display the firmware version at the very top ("Software Version"), the unit ID on the second line, followed by various copyright information.
7. Touch "Back" to return to the previous page.

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 3.10 to 3.20: (released 11/25/2009)

1. Added profile support for Garmin Custom Maps.
2. Fixed lockup while using GB Discoverer maps.

Firmware Upgrade V3.20 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.4 MB)

To table of contents

Changes made from version 3.00 to 3.10:

1. Added support for Garmin Custom Maps.
2. Improved along road routing performance.
3. Improved map panning and zooming.

Firmware Upgrade V3.10 (Not available for download)

To table of contents

Changes made from version 2.90 to 3.00:

1. Added Waypoint Averaging application. For more information visit GARMIN's new Trail Tech website at garmin.blogs.com/softwareupdates/trail-tech/.
2. Added ability to load maps from any img file in the Garmin directory.
3. Added ability to see a list of points from the map when several points are at the same location.
4. Added customizable text to unit power-on screen (see \Garmin\startup.txt).
5. Improved render quality of GB Discoverer maps and maps with satellite imagery.
6. Improved power on reliability.
7. Improved connection reliability with Spanner.
8. Improved appearance of depth data field when using big numbers.
9. Fixed some scan points not working properly with Garmin GB Discoverer maps.
10. Fixed issue with Garmin GB Discover maps not showing at some zoom levels with detail set to least.
11. Fixed errors in user grid entry.
12. Fixed the time label of the graph in Elevation Plot.
13. Fixed selection of Leap Day on Calendar, Hunt & Fish and Sun & Moon pages.
14. Fixed hunting waypoint symbols not transferring properly.
15. Fixed issues with routing avoidances.

Firmware Upgrade V3.00 (Not available for download)

To table of contents

Changes made from version 2.80 to 2.90: (released 12/05/2008)

1. Added support for Garmin GB Discoverer maps.
2. Added ability to view marine chart notes for marine points.
3. Added ability to change the date for the tide and currents charts.
4. Added support for marine fishing, nautical, and off modes.
5. Fixed a potential shutdown that can occur when panning the map that is showing satellite imagery.
6. Fixed issue with 3d view not showing proper elevation detail.

Firmware Upgrade V2.90 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.3 MB)

To table of contents

Changes made from version 2.70 to 2.80:

1. Fixed issue when marking waypoints in the W Malayan RSO position format.
2. Added GDA94 and NAD83 datum support.
3. Fixed importing gpx files from outside of the Garmin\GPX folder.

Firmware Upgrade V2.80 (Not available for download)

To table of contents

Changes made from version 2.60 to 2.70: (released 09/11/2008)

1. Improved accuracy of altimeter for large altitude changes.
2. Fixed text writing on top of itself in some geocaches descriptions.
3. Fixed freeze when loading some geocaches descriptions.
4. Fixed issues with power off pressure trending.
5. Added support for downloading geocaches written using Groundspeak v1.1 extentions.
6. Improved map drawing performance in some situations.
7. Fixed 3D View not showing detail from supplemental maps.
8. Fixed waypoint and geocache symbols not updating on the map after being changed.
9. Fixed issue where the Colorado would temporarily stop responding after a spell search.
10. Fixed issue with elevation over time plot.
11. Fixed issue with position format not saving over power cycles.
12. Fixed issue with display of selected location config field.

Firmware Upgrade V2.70 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.3 MB)

To table of contents

Changes made from version 2.50 to 2.60: (released 07/17/2008)

1. Added ability to turn elevation shading off, included in user profile settings.
2. Added ability to log a comment with geocaching Field Notes.
3. Added ability to save map selections to user profile settings.
4. Added compass setting to saved user profile settings.
5. Added tracback along current track.
6. Added ability to determine public land survey or USGS Quad name for Topo 24k HD cartography.
7. Added progress bar during software updates.
8. Added error message when the max number of geocache or gpx files is exceeded.
9. Added ability to search near a map point.
10. Added ability to use the map to add a point to a route.
11. Fixed shutdown when deleting a waypoint from the map.
12. Improved odometer distance calculation.
13. Improved Wherigo engine.
14. Improved backlight behavior.
15. Improved compass / GPS heading autoswitch behavior.
16. Improved keyboard behavior in address & intersection searches.
17. Improved behavior in low battery state.
18. Improved behavior of turn-by-turn route recalculations.
19. Improved map drawing to eliminate redraws when not necessary.
20. Improved map drawing to reduce partial map draws.
21. Improved map drawing to enhance appearance of trails.
22. Improved usability of WGS84 by listing as a datum rather than just a spheroid.
23. Improved automatic track archiving when archiving very lengthy activity segments.
24. Improved button behavior when logging geocache attempt
25. Improved stopwatch timing.
26. Improved distance precision when reviewing a point and tracks.
27. Improved inter-tidal color in non-marine colors.
28. Improved readability of geocache_visit.txt.
29. Increased maximum number of GPX files processed to 200.
30. Corrected guidance text to not truncate streets when not necessary.
31. Corrected behavior of proximity alarms in custom points of interest.
32. Corrected potential issues that prevented user alarm from sounding.
33. Corrected map drawing above 75 degrees latitude.
34. Corrected potential issue when attempting to delete profiles.
35. Corrected issue that generated extra waypoints at poweron when 'Mark Waypoint' was the first listed shortcut.
36. Corrected potential issue preventing 'Waypoints' from being listed in 'Where to?'.
37. Corrected issue that prevented poor signal strength messages from disappearing if a fix was achieved.
38. Corrected calculated issue that prevented complete display of large numbers.
39. Corrected specified schema path for GPX files.
40. Corrected Dutch keyboard to include 'Z' for address searches.
41. Corrected User Grid to retain settings between power cycles.
42. Corrected User Grid to allow 'E' and 'W' for longitude origin entry.
43. Corrected shutdown issue when unit has empty Saved.gpx file.
44. Corrected issue of missing active route when you select 'GO' from the full screen map in geocache mode.
45. Corrected issue when selecting a custom poi from the recent found list after it is removed from the system.
46. Corrected issue when selecting units on the stopwatch page using non-English languages.
47. Corrected issue when you spell a geocache and the list doesn't reduce when the keyboard auto-pops.
48. Corrected issue where you can't get to a hint for a geocache once you set it to found then back to unfound.
49. Corrected issue where the chart information option would show up incorrectly.
50. Corrected duplicate entries in the other menu when in page loop mode.
51. Corrected external power lost message in non-English languages.
52. Corrected issue with waypoint symbol selection shutdown.
53. Corrected issue where the unit will hang when you try to restore a Wherigo cartridge.
54. Corrected potential shutdown going to mass storage mode when you have custom POI's loaded.
55. Corrected issues with Cyrillic characters.

Firmware Upgrade V2.60 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.3 MB)

To table of contents

Changes made from version 2.40 to 2.50:

1. Added ability to reposition waypoint to current location.
2. Added support for language-specific keyboards.
3. Added support for editing location in all position formats.
4. Added Spanner support.
5. Improved drawing of BlueChart tidal areas.
6. Improved performance when exiting mass storage mode.
7. Improved paperless goecaching (various).
8. Improved Wherigo player (various).
9. Corrected potential shutdown when selecting maps with a large variety of maps loaded.
10. Corrected potential shutdown when profiling a long route.
11. Corrected avoiding highways.
12. Corrected display of found geocaches.
13. Corrected issue preventing name of lakes and rivers from showing when highlighted.

Firmware Upgrade V2.50 (Not available for download)

To table of contents

Changes made from version 2.30 to 2.40: (released 02/18/2008)

1. Improved acquisition time in certain circumstances.
2. Improved power on time.
3. Improved backlight support.
4. Improved support for NiMH batteries.
5. Improved Wherigo player.
6. Added ability to show and review geocaches on the map.
7. Added ability to log geocaches as found.
8. Increased maximum geocache count to 2000.
9. Added support for BlueChart currents.
10. Added ability to view extended information for custom POI's.
11. Added ability for turn preview beep to reset the backlight timeout.
12. Corrected map to display road labels.
13. Corrected map to display small towns.
14. Corrected map to not change orientation when beginning pan mode.
15. Corrected metric nautical setting to display appropriate map scale.
16. Support for Colorado Field Notes, at geocaching.com.

Firmware Upgrade V2.40 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.2 MB)

To table of contents

Changes made from version 2.20 to 2.30: (released 01/22/2008)

1. Added setting to turn off the compass.
2. Alarm clock will not change your backlight if it is already on.
3. Low battery warning shows on powerup when appropriate.
4. Improved DEM shading with supplemental maps.
5. Fixed marine colors for depth soundings and active track.
6. Added ability to view extended chart information and chart notes.
7. Improve share wirelessly connection.

Firmware Upgrade V2.30 (Self-extracting ZIP-file, requires a PC and a connection cable, 3.2 MB)

To table of contents

Changes made from version 2.10 to 2.20:

1. Fixed potential shutdown when using partially discharged alkaline batteries and significant amounts of backlight.
2. Improved backlight usability.
3. Corrected potential memory leak on altimeter page.
4. Corrected issue that changed map setting to north up if reviewing a point on the map.
5. Changed the automotive view angle to match automotive products.
6. Added ability to exit compass calibration if calibration fails.
7. Improved performance and error handling of Share Wirelessly application.
8. Corrected tone of route turn warnings.
9. Added height and depth information on review pages if the information is available (related to marine maps).
10. Corrected drawing of spot soundings.
11. Improved drawing of satellite imagery in 400i and 400c.

Firmware Upgrade V2.20 (Not available for download)

To table of contents

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