Garmin have just released a GNT 10 beta app on the connectIQ store.
Did someone already gave a try?
I just ordered a GNT 10 and will provide my feedback when received and installed.
Here is the description from the store:
Connect your watch to an onboard GNT 10 and view streaming boat data right on your wrist, wherever you are on the boat. This app does not support Automatic MOB Detection.
Data screens are configurable - up to 6 screens with 3 datafields per screen.
Use UP/DOWN to scroll between screens, press START to customize the current screen. Hold UP to access the settings menu, press BACK to exit the app.
The following datafields are supported by the GNT 10:
PGN 127250 - HEADING
PGN 128259 - BOAT SPD (Speed Through Water)
PGN 128267 - DEPTH
PGN 129026 - COG (Course Over Ground / GPS Heading)
PGN 129026 - SOG (Speed Over Ground)
PGN 129283 - XTE (Cross Track Error / Off Course)
PGN 129285 - DIST NEXT (Distance to Next Waypoint)
PGN 130306 - AWA (Apparent Wind Angle)
PGN 130306 - AWS (Apparent Wind Speed)
PGN 130306 - TWA (True Wind Angle)
PGN 130306 - TWS (True Wind Speed)
PGN 130312 - SEA TEMP