Dive Computers: Practical Guide for Reef Divers

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Years ago, dive tables were the only option. These days, nearly all recreational divers use a personal dive computer and for good reason.

The computer monitors depth, time, speed of ascent, and no-deco limits in real-time. Tables can't do that. When you go shallower during a dive, the computer recalculates. Tables are set before you get in.

Watch-style computers are what the majority of divers use at this point. They're compact, readable underwater, and you'll use them as a regular watch too. Console computers are still around but fewer people choose them now.

Budget computers go source for around $300-odd and handle everything a recreational diver requires. You get depth, bottom time, no-deco limits, log function, and usually a basic apnea mode. Mid-range includes air integration, better displays, and extra nitrox compatibility.

Something new divers overlook is conservatism settings. Certain models are more conservative than others. A conservative setting gives you reduced no-deco time. Looser settings extend bottom time but with less safety margin. It's not right or wrong. It's what you're comfortable with and experience level.

Check with the staff at a dive shop who's used various brands first. Staff will give you real-world feedback on which ones hold up and what's marketing. The better Cairns dive stores put out product guides and honest reviews online too

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