Suunto D9 combines all dive-critical information in one instrument, conveniently mounted on your wrist. Instead of monitoring a multitude of gauges, you can concentrate on what is important - diving. The world's first dive computer to incorporate a digital compass, it is functional on land or under water. The compass shows the general direction with a graphical compass rose, as well as the exact bearing with a numerical display. By using Suunto D9's optional wireless transmitter, the diver can also monitor tank pressure and air consumption data from the wrist. The remaining tank pressure is displayed both numerically and graphically, and an estimation of the remaining air-time is given throughout the dive. This allows the diver to monitor the remaining air supply at the same time as he monitors depth and time.