Deco with too less air, options from the book

[JeffG]

J, you lost me here on this statement---hmmmmmm Have you been hanging around the coffee pot a bit to much this morning?

I think he is holding onto old grudges.

 

[HowardE]

just read a book and beside the other option, of getting a other tank, taking o2 etc....
If you have for any reason (don't want to discuss why this shouldn't happen...) not enough air for your deco where to cut??

The book I read tells...don't cut the time on the deeper stops, as that might be harmful for brain and nerves. While missing the upper stops is less harmful.

For me that's very surprising. My first idea would be to think that everywhere are safety margins and cut on them.

For example Deco 2000 Table
48 Meter 19 Minute tells
12 Meter: 2 Minute
9 Meter: 3
6 Meter: 6
3 Meter: 14

Normaly I would also do 1 Minute at 15 Meter, in emergency of course I would not do it.

One of my ideas would be, fall back on the table values of 17 min at 48 meter
12:1
9: 3
6: 5
3: 11 and stay at 3 till the air is finished

Or take the original values and change on everything 1 Meter up and 1 minute less???

What do you think, or what does some software tell?

Just a refresher on what the OP was and what it sounds like he wanted to say.

It sounds to me like he's asking -

The book I read tells...don't cut the time on the deeper stops, as that might be harmful for brain and nerves. While missing the upper stops is less harmful.

The rest is purely a hypothetical scenario.

For whatever reason you end up in a situation where you're low on gas, and have to choose to skimp on Deco time (which everyone agrees - I think) is a bad situation that you shouldn't be in - in the first place. And the OP even said...

If you have for any reason (don't want to discuss why this shouldn't happen...) not enough air for your deco where to cut??

This is the gist of his question... Which decompression stops would be the wisest choice to cut short (IF you find yourself in this crappy situation)? The DEEPER Deco stops (not a deepstop but an actual DEEP DECO STOP) or the Shallower Stops.

Right?

 

[texdiveguy]

This is the gist of his question... Which decompression stops would be the wisest choice to cut short (IF you find yourself in this crappy situation)? The DEEPER Deco stops (not a deepstop but an actual DEEP DECO STOP) or the Shallower Stops.

Right?

Howard, this is the way I interpreted it back at #14.

 

[HowardE]

Just steering people back in the right direction

 

[texdiveguy]

just steering people back in the right direction

.............. 10-4

 

[MXGratefulDiver]

Just a refresher on what the OP was and what it sounds like he wanted to say.

It sounds to me like he's asking -

The rest is purely a hypothetical scenario.

For whatever reason you end up in a situation where you're low on gas, and have to choose to skimp on Deco time (which everyone agrees - I think) is a bad situation that you shouldn't be in - in the first place. And the OP even said...

This is the gist of his question... Which decompression stops would be the wisest choice to cut short (IF you find yourself in this crappy situation)? The DEEPER Deco stops (not a deepstop but an actual DEEP DECO STOP) or the Shallower Stops.

Right?

Given the profile he posted, I'd keep the deep stops, skimp the shallow ones, and hope there was an O2 kit on the boat.

Because given the profile, the fast tissues will be saturated for sure, but the slow tissues might be less so. Deep stops primarily benefit fast tissues. Mess with them and you're looking at a Type 2 hit, which is far more serious than the Type 1 hit you're potentially looking at by skipping the shallow stops.

Type 1 hits are less common, and more treatable. If you're gonna play the odds, that's how I'd play them.

... Bob (Grateful Diver)

 

[String]

This is the gist of his question... Which decompression stops would be the wisest choice to cut short (IF you find yourself in this crappy situation)?

That's about as sensible as asking what precautions i take on every dive in the even of alien invasion removing my boat cover while submerged - a situation that just can't happen.

If you're going to plan for the ridiculous why stop there? What happens if a nuclear war starts when im diving? Do i take spare gas?

 

[HowardE]

That's about as sensible as asking what precautions i take on every dive in the even of alien invasion removing my boat cover while submerged - a situation that just can't happen.

If you're going to plan for the ridiculous why stop there? What happens if a nuclear war starts when im diving? Do i take spare gas?

You could just not answer instead of being sarcastic.

The question is... would you choose to abbreviate a deep stop or a shallow stop?

I know I would opt for doing the deeper deco stops fully, and abbreviating the shallower deco stops... Which is answering the question.

I think the scenario in question is about as likely as a nuclear war as well, but the real question is about the importance of the deeper stops vs the shallower stops. Which can be answered without flaming the guy for asking it.

 

[texdiveguy]

Actually the dive in the OP's scenario is going to be very short (wreck site I think he mentioned-what ever//154ft//single med. sized tank and no redundant gas)......deep stops by nature are shorter than shallow and shallow stops are by design longer....with this particular scenario it is best to follow a traditional deco plan as your gas will allow, as tissue loading is going to be minimal anyways at this stage....staying deep on a slim amount of gas it not a good thing under any circumstance, I would prefer if the case evolved to the point of a CESA doing it from shallow waters. It's a flip of the coin as to the outcome. Crazy stuff.

 

[String]

You could just not answer instead of being sarcastic.

I did answer - like others informed him it was a ridiclous question and a situation that cannot happen if proper planning is used.

The question is... would you choose to abbreviate a deep stop or a shallow stop?

Neither. Id make sure enough gas was available to do the stops. Which is the whole point of this.

Which can be answered without flaming the guy for asking it.

If you ask a stupid question you can expect to get a sarcastic and blunt response. And it was a stupid question.