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Huge variety of high quality dive computers in the popular brands that divers love. Choose from wrist style, console, or air-integrated.
HOW TO CHOOSE A DIVE COMPUTER:
Style: Dive computers can be either part of your console along with a pressure gauge (and compass) or it can be worn on your wrist. Wrist style computers can also be worn while snorkeling and free diving. In terms of size, a wrist style can be a smaller, watch-size or a larger, hockey-puck size.
Air Integration: Some dive computers will allow you to integrate the air pressure reading from your scuba tank. In a console style, the computer will replace your depth and pressure gauges. In a wrist style, you will need a transmitter that fits into the first stage of your regulator, usually you will still have a backup set of analog gauges in a console as well.
Nitrox Compatible: Most dive computers nowadays will accommodate different gas mixes including Nitrox. Even if you don't dive Nitrox now, this is something to consider as an option in the future.
PC Downloadable: After your dives, you may want to download the data to your PC to add to your logbook. Information usually includes maximum depth, average depth, dive time, water temperature, alarm warnings, and a graphical depiction of your dive. Downloading cables are not included with all computers but may be purchased separately.
Alarms: These may be visual or audible and will usually indicate warnings such as ascent rate, exceeding NDL, exceeding max depth, etc.
Modes: All computers will have a Dive mode which give you information during the dive including depth, bottom time, and your no-decompression limit. The Log mode is used on the surface and will give you the information from past dives, including max depth, average depth, actual bottom time, water temperature just to name a few. The Plan mode will be useful prior to the dive as it will indicate a variety of depths and the no-decompression limit at that depth, based on your immediate dive history, to help plan your next dive. Other modes that may be available depending on the computer model include Gauge mode, which allows you to run the computer as a bottom timer and depth indicator only, and Freedive mode, which allows you to record your freediving/snorkeling activities.
Other Funcutions and Features: These will vary from computer to computer and are worth a detailed look. Every diver has different needs and preferences you should look for what appeals to you and your diving style. User changable battery, digital compass and multiple gas mix are a few examples.