
The no-stop limit is the most important piece of information a dive computer provides. A computer program will take into account depth and air in order to calculate this limit and offer data on when to begin the ascent or decompression stop. This data is also known "no time left"
Different preferences
While there are many differences between dive computers, most have the same basic functions. These include displaying depth, tracking Nitro loading, ascent rate, and logging the dive. Divers might choose to use a different type of computer because they have different NDL times. A diver may have different settings than the one recommended. Before you buy a dive computer, plan your dive and compare the models to find the best one for you.

Functions
A dive computer can help you remain safe while you're under water. It calculates based on your information. Next, it compares that information to the dive tables in order to calculate how much time you have at sea. The calculations are not difficult to understand, but it's important to be familiar with the range of your computer's liberal-conservative bias. A liberal-leaning computer can help you maximize your bottom time and improve 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 also find useful extra features in some dive computers, such as the compass direction or water temperature. Dive computers can even be used to save data to a personal computer. This may prove useful for accident investigators. These features make a dive computer invaluable, and can even be used to determine the cause of an accident.
Safety limits
Diver computers use a range algorithms to calculate decompression rates. Acceptable DCS can range from 2-5 percent. But, each person's susceptibility to injury and accident will affect how much they are acceptable. The US Navy, commercial diving and other organizations often strive to achieve DCS levels of 0.1 percent or 0.025%. To ensure maximum safety, a dive computer should be able correctly run the decompression algorithm. But diving with a computer can be more complicated than it looks.

Cost
It is crucial to choose the right dive computer for you in order to avoid any diving accidents. These devices use algorithms that determine how long a diver can remain underwater. Most dive computers use the same algorithms but every diver has a different body composition and fitness level. Different machines will recommend different stops. Others may recommend more no-flys. It doesn't matter what dive computer you choose; it will allow you to stay underwater for longer periods of time and lower the chance of getting decompression sickness.