Dive Computers: Practical Guide for Scuba Divers

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Years ago, dive tables were the standard. These days, nearly all recreational divers use a dive computer and they should.

The computer calculates depth, bottom time, ascent rate, and NDL in real-time. Tables can't do that. If you go shallower during a dive, the computer recalculates. Tables don't.

Wrist computers are what most people use now. These are compact, easy to read, and you'll use them as a watch as well. Hose-mounted models are an option but fewer people go that way now.

Basic computers run about $250-400 and cover everything the average diver needs. You get depth learn more here tracking, dive time, no-deco limits, log function, and sometimes an entry-level apnea mode. Mid-range includes wireless air monitoring, nicer readability, and more mix modes.

What buyers don't think about is algorithm differences. Some models are tighter than others. A cautious algorithm means reduced bottom time. More aggressive ones extend time but with less margin. It's not right or wrong. It just what you're comfortable with and your diving background.

Worth talking to someone at a Cairns dive shop who uses multiple models before you decide. They'll give you a straight answer on which ones hold up versus what's hype. Decent dive shops have buying guides and honest reviews on their websites too

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