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Pittsburg, Kansas | Tri mix is a whole nuther world. Switch to the wrong gas when ascending or decending and good chance you are dead. Rebreather can let you stay down for hours.
At 100ft depth that is three additional atmospheres above surface pressure. So you are breathing gas (air in my situation) at a pressure of 3x14.7 or almost 45 psi above air at the surface. 200 feet double that at almost90 psi at the mouthpiece. So it is not surprising it does something to a person's physiology.
Absorbing gasses in the bloodstream at a commensurate rate according to either Boyles or Henry's law on partial pressures (I never remember which is which). It is these absorbed gasses that can become problematic. Nitrogen is narcotic. Oxygen somewhere between 1.4 and 2.0 concentration is deadly. Any of it if the concentration tries to go from absorbed liquid to a gas is problematic. Using mixed gas like tri-mix helps by substituting an inert gas for Nitrogen or oxygen, but then at shallow depths not enough oxygen to maintain consciousness so have to switch to air or nitrox for decompression. And have to read the correct reading on dive computer and switch gasses appropriately (my computer will handle up to two gasses but I only ever use one, either air or 32% nitrox)
Gets complicated. | |
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Antique Anchor #2 scubadiving
