Dive Computers: What to Know

Years ago, dive tables were the standard. These days, the majority of divers wear a dive computer and they should.

The computer monitors your depth, bottom time, ascent rate, and no-decompression limits in real time. Dive tables are a fixed calculation. When you move between depths during a dive, a computer adjusts. Tables are set before you get in.

Wrist-mount computers are the most common buy now. These are compact, easy to read, and you can wear them as a watch too. Console-mount computers are available but less divers choose them these days.

Budget computers start around a few hundred dollars best dive computers and handle everything the average diver requires. Features include depth tracking, time, no-deco limits, log function, and often an entry-level freediving mode. Mid-range gets you transmitter compatibility, improved displays, and extra nitrox compatibility.

What buyers forget is algorithm differences. Certain computers are tighter than others. A conservative computer results in shorter NDL. More aggressive ones give more time but with less buffer. Both work. It's what you're comfortable with and your diving background.

Worth talking to someone at a local dive store who uses a few different computers before you decide. They'll offer a straight answer on what's good and what's marketing. Decent dive shops publish product guides and comparisons on their websites as well