200ft dive, but avoids the Chamber

[jviehe]

close call.... did he stop at all?

never went on O2 at the scene?

I wonder why not...just curious.
I bet the wife was glad she missed that one.

I guess I read it too fast...why no chamber if you were symptomatic?

I must be missing something...what did DAN do exactly...tell you to drink water?



What symptoms were they waiting for, now? Wish you could offer how the hyperbaric medicine specialist decided you did not need the chamber...I would be very interested in that.

Did you get any treatment at all?

Maybe making you feel stupid would have been a valuable part of the treatment plan. When I do stupid things....I generally am reassured if someone tells me "hey stupid! that is dangerous and you could die!"

This wasnt me. I just posted it.

 

[rhyz]

He dives conservative? ROFL I thought I dove conservative, I quess not..if I ever do a stunt like that.....please...shoot me if I make it back to the surface!

 

[victor]

We crawled along the sea floor to avoid the current, did the swim-through and emptied out at the wall at about 130 feet. Yea! I signaled to my buddy “2-0-0 thumbs-down,” and off we went.

This is the bit that makes me suspicious.
You are not going to have great air consumption doing this. Even a bounce to 130ft fighting current on a single tank (ALU 80 as they are on vacation and flying) is going to require good gas consumption.

Then

After a few "superman" poses and a couple of smiles, I began my ascent. Yet my buddy, “Mr. Bulletproof,” continued to descend. I dropped to 220 feet, watched and waited as he disappeared from sight. I shone my light to get his attention, and continued to watch bubbles, yet more bubbles, and still more.

I waited about five minutes and after glancing at my gauge (1,200 psi was the bare minimum to start the ascent), 1,100 psi was showing.

Well I will accept he was narked so 5 minutes might be an exaggeration I would still be surprised if he was not in an OOA situation before he began his ascent.

Maybe someone could run the gas consumption profile given a descent against the current, followed by a swim through at 130ft, descent to 200ft, 1 or 2 minutes, then descend to 220 for 5 minutes, then slow but sure ascend to 60 ft fighting current with nothing to hang on to, then ascend to the surface, I assume fighting the current all the way to the surface. And all on 1 ALU80.

Boy that must have been some fill.

 

[Sharky1948]

Maybe someone could run the gas consumption profile given a descent against the current, followed by a swim through at 130ft, descent to 200ft, 1 or 2 minutes, then descend to 220 for 5 minutes, then slow but sure ascend to 60 ft fighting current with nothing to hang on to, then ascend to the surface

Here's a quick and dirty deco schedule/gas consumption schedule from V-Planner. Obviously he didn't do the stops, so you will have to draw your own conclusions However, it seem somewhat plausible that the profile could have been done on 80cf.

V-Planner 3.75 by Ross Hemingway,
VPM code by Erik C. Baker.
Decompression model: VPM - B
DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = + 2
Dec to 130ft (2) Air 50ft/min descent.
Level 130ft 0:24 (3) Air 1.04 ppO2, 130ft ead
Dec to 200ft (4) Air 50ft/min descent.
Level 200ft 0:36 (5) Air 1.48 ppO2, 200ft ead
Dec to 220ft (5) Air 60ft/min descent.
Level 220ft 4:40 (10) Air 1.61 ppO2, 220ft ead
Asc to 70ft (15) Air -30ft/min ascent.
Stop at 70ft 2:00 (17) Air 0.65 ppO2, 70ft ead
Level 60ft 3:00 (20) Air 0.59 ppO2, 60ft ead
Asc to 50ft (20) Air -30ft/min ascent.
Stop at 50ft 0:20 (21) Air 0.53 ppO2, 50ft ead
Stop at 40ft 3:00 (24) Air 0.46 ppO2, 40ft ead
Stop at 30ft 4:00 (28) Air 0.40 ppO2, 30ft ead
Stop at 20ft 6:00 (34) Air 0.34 ppO2, 20ft ead
Stop at 10ft 10:00 (44) Air 0.27 ppO2, 10ft ead
Surface (44) Air -30ft/min ascent.
NOTE: This Multi Level dive requires intermediate deco stops between levels.
OTU's this dive: 22
CNS Total: 16.3%
95.1 cu ft Air
95.1 cu ft TOTAL

 

[Sharky1948]

You don't tox immediately if you exceed 1.6 and its possible that high ppN2s protect somewhat against the ppO2s -- lots of air divers have been to 250+ without toxing or displaying symptoms (particularly before anyone knew any better) -- _Caverns Measureless to Man_ has a bunch of depth record attempts on air where 1.6 ppO2s were exceeded...

Not that its a particularly good idea, but ~200 on air is possible without a tox...

Yep. Prior to Trimix, lots of divers dove the Doria (190' minimum, 240' maximum) without problems. And, no one died. Deaths have all been post Trimix. Go figure...

 

[Scuba_Steve]

Yep. Prior to Trimix, lots of divers dove the Doria (190' minimum, 240' maximum) without problems. And, no one died. Deaths have all been post Trimix. Go figure...

Ahhh. OK.

 

[victor]

Here's a quick and dirty deco schedule/gas consumption schedule from V-Planner. Obviously he didn't do the stops, so you will have to draw your own conclusions However, it seem somewhat plausible that the profile could have been done on 80cf.

V-Planner 3.75 by Ross Hemingway,
VPM code by Erik C. Baker.
Decompression model: VPM - B
DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = + 2
Dec to 130ft (2) Air 50ft/min descent.
Level 130ft 0:24 (3) Air 1.04 ppO2, 130ft ead
Dec to 200ft (4) Air 50ft/min descent.
Level 200ft 0:36 (5) Air 1.48 ppO2, 200ft ead
Dec to 220ft (5) Air 60ft/min descent.
Level 220ft 4:40 (10) Air 1.61 ppO2, 220ft ead
Asc to 70ft (15) Air -30ft/min ascent.
Stop at 70ft 2:00 (17) Air 0.65 ppO2, 70ft ead
Level 60ft 3:00 (20) Air 0.59 ppO2, 60ft ead
Asc to 50ft (20) Air -30ft/min ascent.
Stop at 50ft 0:20 (21) Air 0.53 ppO2, 50ft ead
Stop at 40ft 3:00 (24) Air 0.46 ppO2, 40ft ead
Stop at 30ft 4:00 (28) Air 0.40 ppO2, 30ft ead
Stop at 20ft 6:00 (34) Air 0.34 ppO2, 20ft ead
Stop at 10ft 10:00 (44) Air 0.27 ppO2, 10ft ead
Surface (44) Air -30ft/min ascent.
NOTE: This Multi Level dive requires intermediate deco stops between levels.
OTU's this dive: 22
CNS Total: 16.3%
95.1 cu ft Air
95.1 cu ft TOTAL

I must admit I am surprised that this is as close to 80 cu ft given this profile.
At what point would he have run out of air?
Does that match the story where he hit 300 psi at 60ft.
I guess they must have had a good SAC, and fighting the current did not screw it up.

Well hey were 2 very lucky divers if they got away with this dive.

 

[jviehe]

He could have been on a HP130 for all we know.

 

[cerich]

I know Divemasters in Cayman (I once was one of them) who could bounce 220 on a single alum 80 all day and still do the deco stops.

Not safe, not smart and not a recommendation but it was done frequently. Not with students or guests however.....

 

[TSherman]

Do everyone a favor...sell all of your gear, kill your buddy and never speak to anyone of your diving. It is because of people like this story that people deem the sport unsafe! 200 feet and a bounce dive with "reef" equipment makes you nothing more than stupid....period. No one that dives that deep thinks you are cool either, just an ***.

You should really stick to a swimming pool and leave the diving to people with some brain wave activity.

Thanks,
the Safe Divers