CESA over Shared Air Ascent: Which is Best

[Al Mialkovsky]

A safety stop from a 25' dive?
the entire dive should be considered to be a safety stop...

I actually do a safety stop, when I've done a dive shallower than 30 feet it's a shore dive and spending a few minutes in the safety stop range is actually difficult to avoid. Even if I wanted to. But I'm no longer 21 years old and I'm no longer an athlete. Why not set a good example and do a safety stop on every dive. I could care less what some agencies say about blowing off a safety stop, it's irresponsible in my eyes for them to say you don't need one.

Very slow ascents go hand in hand with safety stops.

 

[oly5050user]

I actually do a safety stop, when I've done a dive shallower than 30 feet it's a shore dive and spending a few minutes in the safety stop range is actually difficult to avoid. Even if I wanted to. But I'm no longer 21 years old and I'm no longer an athlete. Why not set a good example and do a safety stop on every dive. I could care less what some agencies say about blowing off a safety stop, it's irresponsible in my eyes for them to say you don't need one.

Very slow ascents go hand in hand with safety stops.

So a safety stop is needed on a 25' dive or less ..ok

 

[Tigerman]

So a safety stop is needed on a 25' dive or less ..ok

Laugh as much as you want, but hes not alone...
I know several people who ALWAYS do a safety stop. I also do a safety stop of some form on close to every single dive, either due to the topography of the dive or because I stop on my way to the surface.

 

[oly5050user]

Laugh as much as you want, but hes not alone...
I know several people who ALWAYS do a safety stop. I also do a safety stop of some form on close to every single dive, either due to the topography of the dive or because I stop on my way to the surface.

your profile says you are not certified... Certified here in 1967-teaching in 1971,but you with no logged dives,none or very little real world experience know better..OK..

what do you define as a safety stop? Is it a 3 minute stop at 15' ?
Thats what it is.. The pressure gradient on a 25' recreational dive is sooo little that again like I said the entire dive is a safety stop..with your definitions I should do a safety stop on a free dive ..

 

[MauiScubaSteve]

Maybe we should start a new poll. Who actully does a safety stop from a 25 ft dive????

trtldvr
Florida Keys Safe Diving Initiative

In case it wasn't obvious, I might actually vote in that poll!

 

[Tigerman]

your profile says you are not certified... Certified here in 1967-teaching in 1971,but you with no logged dives,none or very little real world experience know better..OK..

what do you define as a safety stop? Is it a 3 minute stop at 15' ?
Thats what it is.. The pressure gradient on a 25' recreational dive is sooo little that again like I said the entire dive is a safety stop..with your definitions I should do a safety stop on a free dive ..

If you think freediving and breathing compressed air at >1ata is the same thing, then I guess someone who havent bothered to fill in the correct profile details DOES know better?

 

[oly5050user]

If you think freediving and breathing compressed air at >1ata is the same thing, then I guess someone who havent bothered to fill in the correct profile details DOES know better?

just me being funny as some of the posts here with their beliefs
Oh ,and it is possible to get DCS as a freediver.. difficult,but very possible..with the thoughts expressed here perhaps a freediver should do a safety stop
Oh breathing compressed gas at 25' is closer to 2 atm's not 1..breathing at 1 ata is on the surface..

 

[Al Mialkovsky]

So a safety stop is needed on a 25' dive or less ..ok

Did you understand my reasoning or are you so filled with the desire to put down that you just blew it off?

I said why not do one. I have seen a diver get seriously bent on a dive where he didn't reach 40 feet and was down for 10 minutes at most.

BTW many agencies say the ascent rate is 30 feet per minute, not 60. My computer makes me come up less than 30 feet per minute and in fact the last 15 feet it's programmed to come up at 23 feet per minute.

Now go do your rotf comment so you'll feel better about your superiority.

 

[Tigerman]

just me being funny as some of the posts here with their beliefs
Oh ,and it is possible to get DCS as a freediver.. difficult,but very possible..with the thoughts expressed here perhaps a freediver should do a safety stop
Oh breathing compressed gas at 25' is closer to 2 atm's not 1..breathing at 1 ata is on the surface..

You dont understand that >1ata means "more than 1 ata" either?

 

[24940]

just me being funny as some of the posts here with their beliefs

Are you referring to the belief that it is better to do a safety stop than to not do a safety stop?

Where would you draw the line, in terms of depth? 30'? 60'? Does the formation of 'silent bubbles' have any impact on your decision or are the NDLs the only factor you consider?

The pressure differential at 25' (1.76 ATA) is 176% that of surface pressure. While NDLs are very long, you will bubble on direct ascent after an exposure of less than half the NDL. While it is highly unlikely this bubbling would result in full blown DCS, it would be highly likely to result in sub clinical DCS symptoms such as fatigue.

As an instructor, I'm sure you know all this, so I have to ask why you would choose an emergency ascent strategy that would result in sub clinical DCS symptoms and laugh at divers who choose a strategy that does not present that issue.