Dive computers

Dive computers are becoming more and more popular. Where many years ago a dive computer was a luxury item while diving, it now has gained that much popularity that approximately 9 out of 10 divers will use a dive computer while diving. Dive computers are available in different price ranges and functionalities. There are air-integrated dive computers (who will show you the pressure in the cylinder) and non-air integrated dive computers. A dive computer will keep track of the depth and will calculate the bottom time according to your current depth. Ascending to a lesser depth will increase your bottom time. Very sophisticated dive computers can not only calculate your bottom time, but they do so by keeping your personal circumstances, like blood pressure, in regard.

If you have an air integrated dive computer, the dive computer can be attached to a high pressure exit point of the first stage of the regulator or it can have a sensor on the  first stage which will pass on the data to your dive computer who can be worn around your lower arm. Many dive computers also measure the temperature every certain amount of seconds so that a complete temperature profile can be shown on different depths where you have been. Naturally the depth is also recorded. Some dive computers provide the option to download the data of your dive to a computer. For example the Suunto Cobra

As you can see dive computers can be either a watch, a console or a stand-alone wrist model. Most important when buying a dive computer is that you have to feel right about your decision. Do you want a console model, because you don't like a computer around your wrist? Do you want a watch which you can wear day and night. What functionalities should be available on the dive computer (air integration, etc.).