Updates & Downloads
GSD 20 Remote Sounder
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- Chartplotters Update with Garmin Card, Ver. 2010.1026, as of Oct 26, 2010, Download
- Chartplotters Update with SD card, Ver. 2013.0515, as of May 15, 2013, Download
- Garmin Marine Network Update with Garmin Card, Ver. 2013.0327, as of Mar 27, 2013, Download
- Garmin Marine Network Update with SD Card, Ver. 2013.0516, as of May 16, 2013, Download
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