What is the Shallowest Depth at which You Notice Narcosis?

Locus · Jan 9, 2014

I just started regularly going past 60' and I've been getting a peculiar feeling around 90', which seems a bit shallow for narcosis from what I've read. Maybe it's my imagination?

What is the shallowest depth at which you thought narcosis may have been creeping up on you?

Scubanoobi · Jan 9, 2014

Usually around 95 for me...

divin'dog · Jan 9, 2014

Depends... I'd say around 90'-100' and I don't get down that deep too often but have noticed that if I'm diving for a week, it seems that my body gets used to it as the week goes on.

Dirty-Dog · Jan 9, 2014

I have not noticed any narcosis down to the recreational limits, nor do I have any slowing of the usual tests (writing, doing math, opening a combination lock). I know one person who has reported occasionally feeling effects as shallow as 70 feet.
Tolerances vary widely, and it's entirely reasonable to think that if I were at 100FSW in cold dark water, fighting a current, tired, stressed, etc, that I would feel narced.

PfcAJ · Jan 9, 2014

I get a little sloppy with some things as shallow at 85ft. I'm a big proponent of early helium for this reason.

James R · Jan 9, 2014

I don't actually feel it until around 150...not that it isn't there! I just can't actually say "yep, i feel it now" until then.

Anti-Troll Disclaimer
Yes, I am a technical diver.
No, I would not suggest diving that deep on air is a good idea.
No, I would not dive that deep with a single tank, no matter what's in it.

djtimmy77 · Jan 9, 2014

Noticeable around 90', gets pretty strong 100-105'. Enough so that if I don't have something I really want to see down there I will stay shallower.

Good example was Molokini back wall. Divemaster led the group to around 125' however when I hit 105' I didn't like the feeling and signaled to my wife I wanted to move shallower. Ended up moving back up to 80-90' and don't feel like I missed out on anything.

In general I only do a handful of dives deeper than 90' per year, and it is for specific reasons, and my buddies know to keep an eye on me.

Also, I have briefly felt it at shallower depths but only temporary after a fast descent.

Kharon · Jan 9, 2014

I've been to 130 and didn't notice anything but I don't spend much time that deep on any dive.

Adam Grose · Jan 9, 2014

I have gone as deep as 103'. and have not felt it. Was only at that depth for a few minutes, though.... FWIW.

Adam

TSandM · Jan 9, 2014

I've done some really stupid things between 90 and 100 feet. But I don't feel any different. That's why I rarely go down there without helium, and never in a cave any more.

What is the Shallowest Depth at which You Notice Narcosis?

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Locus

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