One of the reasons I bought the MARQ2 Captain was its ability to display boat data on the watch, including autopilot, speed, GPS, heading, etcetera.
Unfortunately, it seems the integration only works if you have GARMIN chart plotters on your boat. I have SIMRAD. It is a bit unfortunate that Garmin does not open up the ability to other providers. The analogy would be to have APPLE not allow you to play YOUTUBE on your phone, or do GOOGLE search on your phone.
Anybody knows if Garmin has any intent to open up data integration outside the GARMIN suite of tools? Surely seems like a missed opportunity.