The main piece of information provided by a dive computer is the no-stop limit. A computer program will factor in depth and air, and calculate the limit. This program will then provide data on when to decompress or begin ascent. This information is also known by the "no remaining stop time".
Different preferences
There are many differences among different dive computers. However, all of them perform the same basic functions like displaying depth and tracking nitrogen loading. Divers may choose one type of diving computer over another due to the fact that it offers different NDL times. Divers may choose to use a different type of computer than what is recommended. Therefore, it is important to plan a dive before purchasing a dive computer. Also, compare various models before deciding which one is best for you.
Functions
A dive computer is designed to help you stay safe when you're underwater. It will run calculations using your information and then compare that information with the relevant dive tables to determine how long you have at deep. Although you don't need to be an expert in math to understand the calculations, it is helpful to have a general idea of where your computer falls within the liberal-conservative spectrum. A liberal-leaning computer is the best choice if you want to maximize your bottom line and increase safety.
Display
Whether wrist-mounted or mounted on a submersible pressure gauge, a dive computer's display screen provides the necessary data to avoid decompression and ensure a safe dive. Divers may appreciate additional features like the compass directions and water temperature. Diver computers may even let users download their data to a personal PC, which can prove helpful for accident investigators. These features can make a divecomputer invaluable, especially for investigating the cause of an accidental accident.
Safety limits
Diver computers use a range algorithms to calculate decompression rates. Although acceptable DCS is between two and five percent, these numbers can vary depending on individual vulnerability and accidents. The US Navy and commercial diving communities often aim for a 0.1 percent mild to 0.025% serious DCS. To ensure safety, a dive computer must be capable of running the correct decompression algorithms. Diving with a dive computer is not always easy.
Cost
Diver accidents can be prevented by choosing the correct computer for you. These devices use algorithms which determine how long a diver is able to stay underwater. While the algorithms for most dive computers are very generic, divers will have their own unique body composition or fitness levels. Different machines will recommend different stops. Some machines will recommend more no-flys than others. Whichever dive computer you choose, it will help you stay underwater longer and reduce the risk of decompression sickness.