For safe and comfortable dives you need to follow certain rules and procedures to monitor and control in many respects. At the beginning of the birth of the diving was used for this special table also lots of primitive devices. And progress does not stand still and in our time, the monitoring of indicators during a dive is much easier with the emergence of underwater comp's computers, but the variety of choice decompresser on the market of diving equipment leads to the dilemma, and finally making the choice is not always clear how to use it properly. These questions are easy to understand turning to your instructor, who will tell you in the course of “ Computer Diving” what model your computer’s memory to fit your needs and how to maximize the efficiency.