Do You Need to Buy a Dive Computer?

Years ago, dive tables were how everyone dived. At this point, the majority of divers use a wrist-mount computer and they should.

Your computer calculates depth, time, speed of ascent, and NDL in real time. Dive tables are a fixed calculation. When you move between depths partway through, it updates. Tables don't.

Watch-style computers are what most people buy these days. These are small enough, readable underwater, and you can wear them as a daily watch as well. Hose-mounted computers are an option but less buyers choose them anymore.

Budget computers go for around $250-400 and cover everything most divers requires. You get depth tracking, time, no-deco limits, log function, and often an entry-level freedive function. Mid-range includes air integration, better displays, and additional gas options.

Something new divers forget is conservatism settings. Certain models are tighter than others. A conservative computer means reduced bottom time. Liberal settings give more time but at reduced buffer. Neither is wrong. It comes down to what you're comfortable with and how experienced you are.

Ask people at a dive shop who dives with multiple brands first. They'll have honest opinions on what works and what isn't just marketing. Most helpful resources good dive stores have buying guides and comparisons on their sites too