Dive Computers: Practical Buyer's Guide for Reef Divers

Tables used to be the only option. At this point, most scuba divers wear a dive computer and they should.

A dive computer calculates your depth, time, speed of ascent, and no-decompression limits in real time. Tables give you a static plan. When you official source move between depths during a dive, it updates. Tables don't.

Watch-style computers are the most common go for these days. These are small enough, readable underwater, and you can wear them as a regular watch too. Hose-mounted computers are an option but fewer buyers pick them now.

Budget computers run about a few hundred dollars and handle everything a recreational diver needs. They give you depth tracking, bottom time, NDL, dive logging, and often a simple apnea mode. Mid-range includes air integration, improved screens, and additional mix modes.

Something buyers overlook is conservatism settings. Some computers are more conservative than others. A conservative setting means shorter NDL. Liberal ones give more bottom time but at a thinner buffer. Both work. It just what you're comfortable with and experience level.

Ask someone at a dive shop who dives with a few different computers before buying. Good dive stores will offer honest opinions on what works versus what's hype. Decent dive shops publish buying guides and rundowns on their websites too