Deco with too less air, options from the book

[letterboy]

Which answers the original question. Plan your dives. THAT is the correct answer to the above. Blindly stumbling through a cluster **** when you've already done 4 or 5 things wrong and STILL stayed down what makes you think they're suddenly going to be capable of getting ANYTHING right?



Actually yes. There are many factors there outside someones control. Which isnt the case running out of gas diving - that is ENTIRELY within the control of the diver.

Right, having a major loss of gas at depth, due to a shark eating my tank, is not preventable.

 

[texdiveguy]

Im just as entitled to post as anyone else. And if i believe someone is being pathologically stupid i'll say so.



No its not a fact. Prove it. Lets have a plausible example of how its going to happen. Don't state things as fact unless you can back them up with proper evidence.



So "plan your dives" isn't constructive?

String...... LOL , it sad to think someone so uniformed is supposidley a dive instructor-OMG! Things go wrong on the very best of planned dives and folks are hurt and killed, come now pop out of your little world and open your eyes.

 

[HowardE]

I think the OP was asking about decompression THEORY and ended up getting involved in a long discussion about technique so let me ask it another way.

You have a deco obligation and for some reason you have to get out faster than planned (school of sharks taking runs at you, dry suit floods in really cold water)
Do you shorten all stops, do deep stops and shorten shallow stops, blow off shallow stops, and how does each circumstance affect decompression.

Quote Worth repeating...

----

Again... I see the consensus as "Do the deeper deco stops as completely as possible if any stops should have to be shortened (for whatever unforseen reason: maybe because an alien ship is threatening to blow up your boat if it doesn't move in 5 minutes, and they sent you a note saying "get up here")... shorten the shallower stops " anyone disagree with that? If so... why?

 

[D_B]

I think the OP was asking about decompression THEORY and ended up getting involved in a long discussion about technique so let me ask it another way.

You have a deco obligation and for some reason you have to get out faster than planned (school of sharks taking runs at you, dry suit floods in really cold water)
Do you shorten all stops, do deep stops and shorten shallow stops, blow off shallow stops, and how does each circumstance affect decompression.

I agree ... the question is not a low on gas problem , it's a shortening of my dive problem and what to do about my deco obligation?
Thank you for the responses that answer that question

 

[JayJudge]

Catastrophic failure- did I say on a single tank? No. Umm- isolator failure springs to mind. And you guys plan for an entrapment that pushes you into longer deco than you have gas for? Again- you are stating you have a plan for entanglement, thats great, you should. There are times and reasons where these things go beyond the scope of planning, that was all I was saying. Therefore- the OP wanted to know which people thought was the best stops to skip. Not how to not get into that situation. Not how great you and your buddy dive together. Not how you plan your dives. For whatever hypothetical reason (it could even be -gasp- curiousity) They asked this question. And the first thing most people on SB seem to do is state how they would never get into that situation. Thats great, I truely hope all your dives go as close to perfect as possible. However, that does no good in answering the original poster's question. Period. My answer was to try to get this back to the question, and maybe hear an actual response.
-J

 

[dumpsterDiver]

So lets have some proper examples of how you can not have enough gas for deco WITHOUT being moronic and not bothering to plan properly.

Sorry, you will have to think for yourself. Try really hard...

 

[TheWetRookie]

As I read this thread I can't help thinking about the divers that have died in the past few weeks due to diving beyond their training. A couple of "cave" divers comes to mind.

While the OP's question may just be a theoretical one, diving around at the depths he has posted should be planned for and not just taken for granted with bail out as an after thought.

 

[hobodiver]

Quote Worth repeating...

----

Again... I see the consensus as "Do the deeper deco stops as completely as possible if any stops should have to be shortened (for whatever unforseen reason: maybe because an alien ship is threatening to blow up your boat if it doesn't move in 5 minutes, and they sent you a note saying "get up here")... shorten the shallower stops " anyone disagree with that? If so... why?

And to add to that, would it matter how large of a deco obligation one had? i.e. if you only have a small deco obligation, do the deep stops, and as much of the shallow ones as possible, but for a large deco obligation do 75% of all deco stops? Or something along those lines? Or to put it another way, is there really one "best" answer, or is the real answer "it depends"?

 

[wedivebc]

As I read this thread I can't help thinking about the divers that have died in the past few weeks due to diving beyond their training. A couple of "cave" divers comes to mind.

While the OP's question may just be a theoretical one, diving around at the depths he has posted should be planned for and not just taken for granted with bail out as an after thought.

Do you use deco software? What if v-planner wouldn't allow you to run a dive plan without proof of training to that level?
It amazes me that every time someone on here asks a theoretical question the "usual suspects" jump on the "get training" bandwagon. Well exploring deco theory is as much a part of training as learning gas management but those who don't really know anything about decompression feel the need to pontificate about something completely unrelated to the topic.
This could have been a thread I would have been interested in.

 

[DaleC]

So lets have some proper examples of how you can not have enough gas for deco WITHOUT being moronic and not bothering to plan properly.

You are following your dive plan when someone else makes an error and you have to consider sharing gas. Perhaps you can abandon a stranger to his/her fate but suppose it is your wife/husband or your best friend.

For the sake of discussion I believe that satisfies your criteria.