Search results
Results from the WOW.Com Content Network
The diver obtains the depth and duration of each stop from a dive computer, decompression tables or dive planning computer software. A technical scuba diver will typically prepare more than one decompression schedule to plan for contingencies such as going deeper than planned or spending longer at depth than planned. [ 36 ]
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 US Navy has used several decompression models from which their published decompression tables and authorized diving computer algorithms have been derived. The original C&R tables used a classic multiple independent parallel compartment model based on the work of J.S.Haldane in England in the early 20th century, using a critical ratio exponential ingassing and outgassing model.
In 2017, Shearwater launched the NERD 2. A successor to the original NERD heads-up dive computer, the NERD 2 eliminated the brain box from the NERD system, [clarification needed] incorporating all of the electronics into the eyepiece. The NERD 2 contains a rechargeable lithium-ion battery, heads-up compass, and dual air integration capability.
The Bühlmann decompression model is a neo-Haldanian model which uses Haldane's or Schreiner's formula for inert gas uptake, a linear expression for tolerated inert gas pressure coupled with a simple parameterised expression for alveolar inert gas pressure and expressions for combining Nitrogen and Helium parameters to model the way inert gases enter and leave the human body as the ambient ...
Soft bags are traditional for local use, when the dive gear may be wet when packed after use. For air travel, hard and soft bags, including those with wheels and telescopic handles are available. [21] Vinyl toolbag with bolt snaps for securing to harness Diving tool bag to carry tools that may be required for the job. Various types and sizes ...
dive computer. Also: "decompression computer" Main article: Dive computer. A device used by a scuba diver to measure the time and depth of a dive so that a safe ascent profile can be calculated and displayed so that the diver can avoid decompression sickness. [30] dive factor. See also: Scuba gas planning#Respiratory minute volume
VVAL 18 is a deterministic model that utilizes the Naval Medical Research Institute Linear Exponential (NMRI LE1 PDA) data set for calculation of decompression schedules. . Phase two testing of the US Navy Diving Computer produced an acceptable algorithm with an expected maximum incidence of decompression sickness (DCS) less than 3.5% assuming that occurrence followed the binomial distribution ...