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. Once underwater; the proven Bühlmann ZHL-16c algorithm makes sure you’re staying within your dive limits. Selectable tone and vibration alerts help keep you informed while you’re submerged. Returning topside; Descent Mk1 also functions as a robust training companion; offering the best features of our Fenix® 5X ultimate multisport GPS watch; including smart notifications to help you stay in touch on the go. What’s more; the Descent Mk1 design is so sleek; comfortable and elegantly crafted; you’ll want to wear it as your everyday timepiece.