How deep have you gone on air?

[Thalassamania]

The difference in sensibilities is, indeed, fascinating,

 

[scubadada]

Brief visit to 153 ft at Ghost Mountain, Grand Cayman. It was a great swim down and back up again.

 

[Krazytomdiver]

As a dive guide,early in my extreme stupidity phase,when the waves were too high for tourists,a bunch of 'krazies' would go out in this old 12' boat with a 20hp Yam,tie to a mooring line,strap-on 20lbs of lead each,hold on to each other,comanndo entry,then see who gave up first. Usually between 200' to 250' someone would 'bail out' then have to buy 'pink pirates' all night for the rest of the group. It's rated right up there with my married women phase and running lights out through the mangro's in my Colombo amigoes fast boats.

"living life without a hard bootom"
KT

 

[Kevrumbo]

My personal physiological deep air depth limit was a solo dive descent approaching 60m in the Nagano Maru's cargo hold, Chuuk Lagoon 2007: Started seeing the "starfield simulation Windows screen saver" all around me, which at the time I thought was due to the severe nitrogen narcosis at 7 ATA ambient pressure (immediately ascended out of the cargo hold and stayed on the deck around 45 to 51m for the duration of the dive). In retrospect however, the effect could also have been the beginning symptoms of an Oxygen-toxicity event just as well (PO2 at 60m depth is 1.5 ATA). . ,

 

[Brendon]

210' Lobster Shop wall Puget Sound WA.

 

[Akimbo]

… Started seeing the "starfield simulation Windows screen saver" all around me, which at the time I thought was due to the severe nitrogen narcosis…

I would guess that those symptoms were narcosis. All the Oxygen Toxicity symptoms with short duration exposure I have seen have been well above 2.0 ATA and were limited to mild nausea and tunnel vision.

The main reason I suspect Narcosis is we were doing a series of dives from 160-210’ where we would switch between air and 21% HeO2 with Sur-D-O2 (which worked very well, zero hits, up to four dives/day). In the beginning, various visual disturbances including slight tunnel vision and floating stars were common on air, nothing on next dive on mix, and back again on the third dive on air. I am no hyperbaric doc, but the logic flow is convincing to me.

Interesting though. After several days of this régime we starting developing a tolerance to narcosis to the point we thought we were on Helium when it was air’s turn. We were cold anyway and had to try speaking into the mouthpiece to convince ourselves we were really on air.

 

[Rhone Man]

187' on the San Francisco Maru. Right on the edge of what I'd be prepared to do, but in the right circumstances I'd do it again.

EDIT: Technically it was on EAN24, but same difference.

 

[scubadobadoo]

As RECREATIONAL diver I have been to 110fsw but that was BEFORE I knew that 99.9% of the time there is nothing that awesome to see down there to waist good bottom time to see it.

 

[Airleron]

122' at Devil's Throat, Coz. That's deep enough for me.

 

[Jax]

I dove the Titanic on sidemount spare airs.