Explore both of your worlds — underwater and topside — with the Descent Mk2 series of watch-sized dive computers. They feature multiple dive modes, such as single and multiple gas dives, gauge, apnea, apnea hunt and closed-circuit rebreather. The Descent Mk2 series comes with ABC sensors with an underwater 3-axis compass as well as surface GPS capabilities to mark your entry and exit points . On land, the Descent Mk2 series doubles as a premium multisport GPS smartwatch with multi-GNSS support, multiple sports apps, wrist-based heart rate monitoring, Pulse Ox sensor, advanced training features, Garmin Pay™ payment service , music storage, smart notifications for calls, texts and calendar alerts and more. The Descent Mk2i dive computer adds SubWave™ sonar technology for integrated tank pressure monitoring on up to 5 tanks when paired with the Descent™ T1 transmitter (sold separately), making it ideal for instructors or group dives.