I hope you have read about the still not fixed issues of the Dmk1 and the lack of updates for this watch. As far as I remember, the last update was 10 month ago...
I think I will buy a different watch from a different company instead of plopping down 1200 or more for a Garmin that is the same hardware for their watches a.d their diver watch but won't let you purchase ther five software to run on them