200' on air for 5 min bottom time?

[Tortuga68]

I meant average in physiological terms.

The plan is perfectly easy to remember, five mins at TD and one minute at 6m.

 

[flots am]

I meant average in physiological terms.

The plan is perfectly easy to remember, five mins at TD and one minute at 6m.

You and vPlanner differ by about 25 minutes of deco.

I'm pretty sure I know which one I'd use.

flots

 

[danvolker]

Lets say I am diving to 200' on air and descend at 50 fpm (4 min) and then stay down for 5 min before ascending. At the moment I ascend what would my ceiling be?

(I assume 4 min at 50 fpm down then 5 min BT would put me into deco)

Thanks

The best advice I can offer is to read this thread.... http://www.scubaboard.com/forums/cozumel/395192-scuabamau-diving-accident.html
While the plan for them was a little deeper than yours, for the vast majority of divers on SB, and with a 99% liklhood this includes you and your friends, the foolish 300 foot bounce the divers in the Mexico story attempted, would be just as likely to happen on a 200 foot bounce dive.

Yes, a small number of divers do OK ( meaning have not died) on air over 200 feet deep...this is not about how smart they are, or how good a diver they are ( not even close), it is not about how well trained they are--which is the ignorant concept of an instructor supposedly "training" someone for deep air dives..... the secret to doing 200 to 300 foot dives and surviving, is in large part much like being one of those people that can chug a full quart of Tequila and then drive their car at 100 mph and survive....and there is a small part where very good dive reflexes and skills are involved.
No one should desire to be able to chug the bottle of Tequila and then be able to drive...it is just ignorant.

I happen to be one of the people that can do 280 foot dives on air--I did hundreds of them in the early 90's... Which is why I can say there is nothing to envy in this....it is like a genetic fluke, and pretty worthless in this day of Trimix diving. Even though I did many of these deep air dives, I had the brains not to do them on a single tank....it was always doubles...often with a pony bottle for deco using 100% O2.

But read the scubamau incident....it should illustrate the foolishness of the undertaking very well, with a recent and real life example of what can happen to people that are GOOD DIVERS.

 

[DCBC]

Yes, a small number of divers do OK ( meaning have not died) on air over 200 feet deep...this is not about how smart they are, or how good a diver they are ( not even close), it is not about how well trained they are--which is the ignorant concept of an instructor supposedly "training" someone for deep air dives..... the secret to doing 200 to 300 foot dives and surviving, is in large part much like being one of those people that can chug a full quart of Tequila and then drive their car at 100 mph and survive....and there is a small part where very good dive reflexes and skills are involved.

There are hundreds of commercial divers worldwide that are diving to 200 FSW on Air as I write this. They (nor their diving Supervisors) feel that this is unsafe in anyway. Millions of hours have been accumulated over the years at this depth safely. Not only do the Divers "survive," they get the job done. The commercial industry is all about the job, not survival. If people couldn't be responsive enough to do the job, it would never be attempted. If you have some understanding about what's required, that would end the discussion. There is nothing about the physical make-up of these Divers that's different to anyone reading this thread (perhaps other than physical condition, training and experience). The commercial industry cannot be compared to betting a billion dollar project on someone "chugging a quart of Tequila and driving a car at 100 mph!

 

[TMHeimer]

My brother did the 200' single tank Air dive when he was 26. Said the narcosis was unreal. He & buddy agreed that the only thought when at 200' was to go back up regardless of narcosis. He said he felt fine until supper when his eyes burned real bad. Years later he said it was the stupidest thing he ever did.

 

[BDSC]

The commercial industry cannot be compared to betting a billion dollar project on someone "chugging a quart of Tequila and driving a car at 100 mph!

That cracked me up!

 

[danvolker]

There are hundreds of commercial divers worldwide that are diving to 200 FSW on Air as I write this. They (nor their diving Supervisors) feel that this is unsafe in anyway. Millions of hours have been accumulated over the years at this depth safely. Not only do the Divers "survive," they get the job done. The commercial industry is all about the job, not survival. If people couldn't be responsive enough to do the job, it would never be attempted. If you have some understanding about what's required, that would end the discussion. There is nothing about the physical make-up of these Divers that's different to anyone reading this thread (perhaps other than physical condition, training and experience). The commercial industry cannot be compared to betting a billion dollar project on someone "chugging a quart of Tequila and driving a car at 100 mph!

I can't say I know much about commercial diving..... I would ask whether or not these 200 foot commercial dives you reference as being so commonplace, are done with an umbilical and effectively an unlimeted air source from the surface....and if they are on helmet communication with a tender....and whether they can be "hauled up" if it was believed they were not responding properly??

 

[BDSC]

There are hundreds of commercial divers worldwide that are diving to 200 FSW on Air as I write this. They (nor their diving Supervisors) feel that this is unsafe in anyway. Millions of hours have been accumulated over the years at this depth safely. Not only do the Divers "survive," they get the job done.

A lot of folks on ScubaBoard are overly dramatic anyway. But you know that. For some, every dive seems to be a matter of life and death.

 

[sealark]

I never read so much bull crap as on this topic. Say goodby

 

[danvolker]

There have been an awful lot of guests with no users looking at this thread....meaning probably that the "content Nazis" or "Censors" are trying to decide if we should be allowed to continue this conversation, or if they need to take it away from us.... Color me "wondering".