Updates & Downloads

GSD 21 Remote Sounder

Bundle

  • Chartplotters Update with Garmin Card, Ver. 2010.1026, as of Oct 26, 2010, Download
  • Garmin Marine Network Update with Garmin Card, Ver. 2013.1125, as of Nov 25, 2013, Download
  • GPSMAP Series with SD Card, Ver. 2015.0515, as of May 15, 2015, Download
  • Legacy GPSMAP with SD Card, Ver. 2015.0515, as of May 15, 2015, Download