Dive computers are battery-operated machines sealed in water-tight housing. They help divers perform complex dives with precision and safety.

It makes sense to understand how this important gadget works. Aside from your dive buddy, your scuba computer is your best friend on a dive.

Scuba computers provide continual tracking of surrounding pressure on a diver to estimate the partial pressure of a diver's internal gases.

The computer uses a decompression algorithm to calculate a decrompession schedule for the diver's ascent. The diver checks his or her dive computer for the decrompression stops required.

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