safety stops, deco stops....

[Blackwood]

What I have real trouble wrapping my mind around are the "mandatory safety stops" from DSAT's Recreational Dive Planner -- if "mandatory" doesn't that mean they are "deco stops" and if NOT "mandatory" then aren't they merely "advisory?" In fact, "all dives are decompression dives" and you will be off-gassing the N2 you absorb, either in the water or on the surface or some combination thereof.

It's very simple. A safety stop, mandatory or otherwise, doesn't come from a decompression model.

Remember, ACCENT is decompression.

For example, the Italian-American version: DEcomPREssion.

 

[NC Wreck Diver]

It's very simple. A safety stop, mandatory or otherwise, doesn't come from a decompression model.



For example, the Italian-American version: DEcomPREssion.

Sorry for the typo in 'Ascent'..........typing a little to fast. I fixed my original post.

BTW, I am Italian American!

 

[Blackwood]

Sorry for the typo in 'Ascent'..........typing a little to fast. I fixed my original post.

BTW, I am Italian American!

I rarely consider hyphenated ethnicity, but I guess I am too, somewhat.

 

[RJP]

Deco stops are compulsory and performed after completing decompression dives (performed by technical divers).

Simply exceeding NDL does not make one a technical diver.

 

[String]

A safety stop is a stop you don't HAVE to do. A deco stop is one you do.

 

[Peter Guy]

Blackwood wrote

A safety stop, mandatory or otherwise, doesn't come from a decompression model.

What? The DSAT RDP IS a "decompression model" and is probably the one with the most empirical, and rigorous, validation (at least that is my understanding). It is a "model" that is designed specifically for "recreational diving" and allows one to safely decompress, in general, without making any stops. BUT, it is still a "decompression model."

Mpet -- I don't understand your comment -- please explain.

 

[Blackwood]

Blackwood wrote
What? The DSAT RDP IS a "decompression model" and is probably the one with the most empirical, and rigorous, validation (at least that is my understanding). It is a "model" that is designed specifically for "recreational diving" and allows one to safely decompress, in general, without making any stops. BUT, it is still a "decompression model."

The buhlmann model behind the DSAT RDP doesn't require any stops for dives within table limits. Those safety stops are added on top after the maths.

 

[RJP]

What I have real trouble wrapping my mind around are the "mandatory safety stops" from DSAT's Recreational Dive Planner -- if "mandatory" doesn't that mean they are "deco stops" and if NOT "mandatory" then aren't they merely "advisory?"

Peter, you're back to your habit of using purposeful hyperbole to take a swing at PADI again. You're a smart guy. You can surely "wrap your mind" around what they're doing, no? Or are you still so distraught about your most recent incident of having been falsely accused of violating standards?



It's simply a way of ensuring that people don't think they are now "deco divers" simply because they've strayed beyond a standard deviation or two of what is "statistically safe" according to the model. By calling the "mandatory safety stops" deco stops you would unfortunately cause many people to "plan" deco dives to those depths and times... plus maybe a bit deeper... and a bit longer... "So if I stay twice as long I simply double my "deco stop" to 6min from 3min, right?

:shocked2:

By serving those stops up as being "outside the bounds of recreational diving" as opposed to being "the beginning of deco diving" you will for sure avoid a great many injuries/accidents.

 

[Mr Carcharodon]

The buhlmann model behind the DSAT RDP doesn't require any stops for dives within table limits. Those safety stops are added on top after the maths.

But where you put the limits is pretty arbitrary at some level. Buhlmann put maxium allowable pressure gradients at one level, DSAT allowed a lower level, and a safety stop pushes the gradient even lower. This is really a matter of picking what is safe enough which is complex. Physical condition, exertion, temperture, exposure protection and the need to get home to one's family can all be inportant factors. Having risk factors in any of those might mean that the safety stop just puts you back at nominal risk.

PADI/DSAT does not have decompression stops because they chose to exclude them from their model. They have no delta-M's that would allow you to calculate a subsurface M value.

 

[DiveNav]

Hi, sorry for my ignorance here, I tried to find out myself but just got confused. Please can someone clarify for me the difference between deco stops and safety stops, and when they are used. Cheers!

Are You a certified diver ?

If so, who was your instructor? You should ask him since you paid for your certification .....

My take on the difference between safety stop and deco stop is: "if you are using our simulator and you ascend missing a deco stop ..... you will be killed "

Alberto (aka eDiver)