Can the iPad use GPS data from a Garmin aera 660? Can the iPad use GPS data from a Garmin aera 660 portable GPS unit? I assume this would happen via Bluetooth, if it's possible. I would like the more accurate WAAS data from the Garmin for use with CloudAhoy.
Most bluetooth external GPS devices conform to NMEA and are compatible with CloudAhoy. I don't know if that's the case with Garmin Aera 660.

However, if used with Garmin Pilot, then you can always export GP's track log to CloudAhoy. (I'm associated with Cloudahoy)