Garmin GPSMAP 66s / 66st User Manual
You can download the user manual for the Garmin GPSMAP 66 series in PDF format here.
Garmin Explore Smartphone App for GPSMAP 66s / 66st
Download the companion smartphone app “Garmin EXPLORE” for the GPSMAP 66 series at the Apple App Store or Google Play Store.
Garmin Explore Portal
The Garmin Explore portal to use with your GPSMAP 66 series GPS to download maps and manage tracks. This is the same portal that inReach users use to manage their devices.
Garmin GPSMAP 66s / 66st Training Content
(coming end of october 2018)