Dive computer wrist

The wrist dive computer is essential gear for divers, tracking depth, bottom time, and safety stops in real time.

About this subject

The wrist dive computer replaced traditional dive tables and analog depth gauges, making diving safer and more accurate. It continuously calculates nitrogen absorbed by body tissues using algorithms such as Bühlmann ZHL-16 or RGBM, displaying maximum bottom time, current depth, and required decompression stops. Many models also include a digital compass, nitrox mode, and air integration to monitor tank pressure.

The first dive computers appeared in the early 1980s, starting with the Orca Edge console model. Today, wrist computers are the most popular, compact and user-friendly. They are waterproof to hundreds of meters, usually with rechargeable or user-replaceable batteries. The precision of pressure and temperature sensors is crucial to prevent decompression sickness.

In Brazil, dive computers are common in recreational and technical diving but not legally required, though strongly recommended by instructors. Choosing the ideal model considers diving type, frequency, and budget. Brands like Suunto, Garmin, Shearwater, and Mares dominate the market, with prices ranging from a few thousand to tens of thousands of reais.

Frequently Asked Questions

How does a dive computer work?

It continuously measures depth and time, applying a decompression algorithm (such as Bühlmann) to estimate nitrogen saturation in tissues. It then calculates maximum bottom time and alerts for safety stops.

What is the difference between a dive computer and a dive table?

Dive tables are static and require manual calculations, whereas a dive computer monitors depth and time in real time, automatically adjusting for multi-level dive profiles. It is more accurate and safer.

Is it mandatory to use a dive computer?

It is not legally required in Brazil, but it is strongly recommended by certification agencies like PADI and SSI to enhance safety and prevent decompression sickness.