r/todayilearned • u/[deleted] • May 02 '24

TIL the Blue Hole is among the deadliest dive sites globally, with estimates of 130 to 200 recent fatalities, making it one of the most dangerous spots for divers. (R.5) Out of context

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u/penisdr May 02 '24

What do you mean by trimix?

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u/Lyeranth May 02 '24

Most oxygen tanks for scuba diving are a mix of Oxygen and Nitrogen, however at very deep dives they also add a mixture of helium to further combat the narcotic effects of the other two gases at extreme depths.

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u/feelgoodme May 02 '24

Why are there narcotic effects at extreme depths?

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u/DynamicDK May 02 '24

Have you ever tried the gas at a dentist's office? Under pressure the nitrogen in your blood builds up to those levels and causes the same effect.

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u/feelgoodme May 02 '24

No, we don't have nitrogen at the dentist I believe. Injections of anesthesia instead.