A dive computer will provide the main piece of information, which is the no stop limit. Computer programs will use depth and air to calculate the limit and provide information on when to ascent or decompression. This data is also known to be the "no stopping time remaining".
Preferences of different people
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 can choose to use one type or another of the dive computers because it has 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 for safety underwater. It runs calculations based on your information, and then compares that information against the corresponding dive tables to determine how much time you have at depth. 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 dive computer is the best option if you want maximum bottom time and safety.
Display
Display screens on dive computers can be wrist-mounted, submersible pressure gauge mounted or both. They provide the information necessary to avoid decompression as well as ensure safe diving. Divers may find it useful to have additional features such as water temperature and compass direction. Dive computers can even be used to save data to a personal computer. This may prove useful for accident investigators. The features of a divecomputer can be invaluable in determining the cause and other purposes.
Safety limits
Diver computers employ a variety of algorithms to calculate decompression times. The acceptable DCS numbers range from 2 to 5 percent. However, individual susceptibility and accidents can affect the figures. The US Navy and commercial diving communities often aim for a 0.1 percent mild to 0.025% serious DCS. To ensure maximum safety, a divecomputer must always be capable of correctly running decompression algorithms. Diving with a dive computer is not always easy.
Cost
Choosing the correct dive computer for your needs is essential to prevent any accidents while diving. These devices use algorithms to determine the maximum time a diver can stay under water. Although most computers use the same algorithms, each diver's body composition and fitness levels will be different. Different machines will recommend different stops. Some will recommend more stop options than others. No matter which dive computer you choose it will enable you to stay underwater longer and less likely to get decompression sick.