Suunto D9 is a water resistant dive computer up to 200m. It combines all dive-critical information such as depth, time, tank pressure, temperature, decompression status and direction all in one instrument, conveniently mounted on your wrist.
Wireless air integration-Suunto D9 allows you to monitor tank pressure and air consumption from your wrist. Tank pressure is displayed both numerically and graphically, and an estimation of the remaining air time is given.
Digital navigation-Suunto D9 displays a graphical representation of a compass rose. A bearing can be locked to help you follow a selected course, and directional arrows point towards the locked bearing.
Multi-mode versatility-Suunto D9 has three dive modes. The Air mode is used for diving with standard air, the Nitrox mode for up to three nitrox mixes, and the Gauge mode for use as a bottom timer.
Flexible decompression-Using the Suunto Deep Stop RGBM algorithm, Suunto D9 enables continuous decompression for optimal ascent time. For deeper dives, the Deep Stop option adds further protection with a series of deep stops.
I've owned one of these for several years, bought it when they first came out. Battery life is two years and cannot be replaced without a special tool. Warranty is void if this is not done by authorized service center. Do the transmitter at the same time. Only problem is it will sometimes lose bind with transmitter during the dive leaving you with no air info. Redundancy twice over, take a gauge. Also suppose to activate on entry if you don't hit the button but dirty contacts will preclude this. Pain in the butt to go back up from twenty feet just to activate. But it is a great computer.
D9 is a great watch. I have the black band one which looks good and makes it easier to read under water. I like the ability to monitor the air situation for others in my group with Suunto transmitters. I send it to a place in CA ever 2 years for servicing. Peace of mind for $60 bucks including shipping. They clean it, test it and put new batteries in it. I agree with others it syncs better just before you get into the water. The best thing about this is handling nitrox and handling multiple dives. It may be a bit conservative in its calculations but have never had a problem. Turn it on and make multiple dives and it keeps you out of trouble.
I have used this computer for many years and it is the best investment in dive gear I have made! The simple operation and compact size, make it ideal for dive trips so you don't even need to bring another watch. The algorithms it uses are conservative yet realistic and alerted me and our dive master when the dive order got reversed and the deep dive was done 2nd! Pairing the watch HAS to be done before you enter the water, which can be a pain with everything else going on at that time, but I've never had a problem with it's operation or reliability. And sending a lief saving device back to the factory for a battery change and look over once every two years, for me is reassuring!