Dive Computer Buyer's Guide: Do You Need One

Back in the day, tables were the standard. Now, most divers use a wrist-mount computer and for good reason.

Your computer tracks depth, time, ascent rate, and no-deco limits in real time. Dive tables are a fixed calculation. If you move between depths during a dive, the computer recalculates. Tables don't.

Wrist-mount computers are what most people buy these days. They're compact, easy to read, best dive computers and you'll use them as a daily watch as well. Hose-mounted computers are available but fewer people go that way now.

Budget computers start around $250-400 and cover everything most divers would need. You get depth, time, NDL, log function, and sometimes a basic freedive function. Stepping up to mid-range gets you transmitter compatibility, improved screens, and additional nitrox options.

Something people forget is how the computer handles. Certain algorithms are tighter than others. A conservative computer means less no-deco time. Looser ones give more time but at reduced safety margin. Both work. It just what you're comfortable with and your diving background.

Worth talking to people at a Cairns dive shop who's used various computers before you decide. Good dive stores will give you real-world feedback on what's good and what's just marketing. Most good dive stores publish product guides and honest reviews on their websites as well