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A dive computer, personal decompression computer or decompression meter is a device used by an underwater diver to measure the elapsed time and depth during a dive and use this data to calculate and display an ascent profile which, according to the programmed decompression algorithm, will give a low risk of decompression sickness.
The dive computer has the advantages of monitoring the actual dive, as opposed to the planned dive, and does not assume on a "square profile" – it dynamically calculates the real profile of pressure exposure in real time, and keeps track of residual gas loading for each tissue used in the algorithm. [32] Dive computers also provide a measure ...
HeinrichsWeikamp – German manufacturer of dive computers and other electronics for recreational diving. Open-source software dive computers. [66] Heliox Technologies – Dive computers. [9] Henderson (wetsuits) [17] J. C. Higgins – Sporting goods sellers. Mail order distributor; Hollis (dive gear) [17]
An electronic depth gauge is an essential component of a dive computer. As the gauge only measures water pressure, there is an inherent inaccuracy in the depth displayed by gauges that are used in both fresh water and seawater due to the difference in the densities of fresh water and seawater due to salinity and temperature variations.
Diving watch is used with depth gauge for decompression monitoring when using decompression tables. Largely superseded by dive computers, where elapsed time is one of the standard displays, and time of day may also be available. Dive timer is an instrument that displays and records depth and elapsed time during the dive. It is usually possible ...
The Shearwater NERD was released at Dive 2013 in Birmingham, UK. [19] Shearwater Perdix in compass mode. In 2015, the Perdix wrist mounted dive computer was released. The Perdix is similar to the Petrel but has a 30% longer battery life and a thinner and lower profile. [20] The computer was named after the grey partridge Perdix perdix. [21]
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