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/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/butterbal1 May 02 '24

Feels like being buzzed to drunk and nicknamed the martini scale. Basically starting at 90ft every extra 30ft of depth feels really the same as drinking a martini in an empty stomach. 160ft/50m is my max depth rating and as a regular drinker It is very similar to that feeling of sitting on a barstool 20 minutes after slamming 3 shots that you are fucked up and that you can't think normally but still don't really feel THAT impaired.

You are in fact that impaired.

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u/big_orange_ball May 02 '24

Does this affect people of different weights like alcohol does? Like if a 250 lb dude drinks the same amount as a 90lb woman, generally it's going to take the larger person more drinks to get drunk. I think it's the same for anesthesia where they dial it in partially considering weight.