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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.
Nav finder and underwater compass – basic underwater navigation tools Suunto SK-7 diving compass in aftermarket wrist mount with bungee straps. Diver navigation, termed "underwater navigation" by scuba divers, [1] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.
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 personal decompression computer, or dive computer, is a small computer designed to be worn by a diver during a dive, with a pressure sensor and an electronic timer mounted in a waterproof and pressure resistant housing and which has been programmed to model the inert gas loading of the diver's tissues in real time during a dive. [31]
The DIR philosophy is opposed to the use of dive computers. Most other technical diver training agencies recommend using two — a primary and a backup. Doing it Right: The Fundamentals of Better Diving page 119 lists 13 reasons why DIR consider dive computers to be bad.
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 ...
You hear it from every corner of the earth when you’re a woman of a certain age. “Lift heavy,” say the experts. “Cardio adds years to your life, but weightlifting adds life to your years.”
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.