Garmin Descent Mk1, Watch-Sized Dive Computer with Surface GPS, Includes Fitness Features, Gray Sapphire with Black Band, 1.2"

Whether you dive with or without tanks, in saltwater or freshwater, breathing nitrox, trimix or holding your breath — Descent Mk1 is the intuitive, do-it-all dive computer you’ve been waiting for. It’s the first watch-sized dive computer to offer surface GPS navigation with full-color onscreen mapping and location reference — so you can easily mark your dive entry and exit points (GPS tracking and satellite communication does not work underwater).