The Importance Of Trimix In Deep Sea Diving
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by: faye_bautista
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Scuba diving is not just attaching the oxygen tank at your back and using it to breathe underwater with a regulator. There is a lot more to it, the fact is in deep sea diving pure oxygen is not used. In recreational diving nitrox mixes are being used so that it lessens the chances in having nitrogen sickness. Even if nitrox is composed of nitrogen and oxygen, there is a lot higher oxygen concentration than air.
Pure oxygen is not used in deep sea diving because of its toxicity. As a person goes deeper underwater the pressure will increase and oxygen toxicity can result. When the oxygen is reduced you are able to go a lot deeper. As you go deeper, the amount of air that you are breathing will increase the amount of nitrogen, which can result to nitrogen narcosis.
You may wonder how deep sea divers go deep underwater. It is done using a combination of nitrogen, oxygen and helium which is called trimix. Helium is used because it reduces the proportions of nitrogen and oxygen. This means that because the oxygen is reduced, it will enable the diver to dive deeper. And, because nitrogen is reduced, the diver will not experience nitrogen sickness or nitrogen narcosis.
The great thing about helium is that it can be breathable under pressure and it has very little narcotic effect. Because of helium's low density, it reduces breathing resistance at depth or at pressure. Also, helium does not enter slow tissues as readily as nitrogen, which causes the bends. The only disadvantage of helium is that it conducts heat 5 times faster.
Also, during descent, deep sea divers suffer from a condition called hyperbaricarthralgia. If you become a deep sea diver, you will learn about the different variations of trimix. Some will be named trimix 10/70 and etc. If you come across with trimix10/70, it will mean that the gas inside the scuba diving tank will be composed of 10 percent oxygen, 70percent helium and 20 percent nitrogen. This kind of mix is suitable for dives up to a hundred meters or 330 feet.
These are the things that you have to remember about trimix. As you can see, deep sea diving is not as simple as it may seem. There are so many aspects in deep sea diving that you have to be aware of and one of them is the gas used for breathing.
So, before you don your scuba diving gears and you plan on going very deep, keep in mind that deep sea diving is a specialty course that one needs to take before they undertake dives like this. Deep sea diving is a lot different from recreational diving. It takes years of training and a lot of discipline.
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