an electronic device used by a scuba diver to measure the dive profile (depth, bottom time etc) and to display information needed for a safe
an electronic instrument that replaces and expands on the functionality of depth gauges and bottom timers (and more frequently now, pressure gauges)
Device that does all the had work for you. No more multi level diving calculations, no more PADI wheel - based on empicic data and theoretic models - not necessarily always right but a great help for repetitive diving. Beeps often.
A computer used to monitor time, depth, NDL's and even air supply remaining, in some units. Most can be used in dive planning, altitude considerations and carry a history of ones dives. Some can be manipulated for various gas mixes other than air. Excellent pieces of dive equipment for serious divers.
device that constantly measures depth and time, based on a pre-programmed algorithm, the computer calculates tissue nitrogen uptake and elimination in several theoretical compartments and provides a continuous readout of the dive profile, including: depth, elapsed time of dive, duration at current depth before decompression becomes mandatory, and a warning if the rate of ascent is too fast.
A dive computer or decompression meter is a device used by a scuba diver to measure the time and depth of a dive so that a safe ascent rate can be calculated and displayed so that the diver can avoid decompression sickness.