Dive Computers: Practical Guide for Reef Divers

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Back in the day, tables were the only option. These days, most scuba divers dive with a personal dive computer and for good reason.

A dive computer tracks your depth, time, ascent rate, and no-deco limits in real-time. Tables give you a static plan. When you change depth during a dive, the computer recalculates. A table can't.

Watch-style computers are the most common buy these days. These are small enough, readable underwater, and you can wear them as a watch as well. Hose-mounted computers are still around but not as many buyers go that way now.

Entry-level computers go for around $300-odd and cover everything most divers needs. You get depth, time, NDL, dive logging, and often a simple freediving mode. The $500-800 range includes air integration, better displays, and extra gas modes.

The one thing buyers see here forget is algorithm differences. Some algorithms are tighter than others. A cautious setting means less NDL. More aggressive settings extend time but at reduced margin. Neither is wrong. It just what you're comfortable with and how experienced you are.

Worth talking to the staff at a local dive store who dives with multiple brands before you decide. Staff will have real-world feedback on what's good and what's hype. Most good dive stores have product guides and rundowns on their websites as well

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