Deco Terminology - call for discussion

Pablo Wolter pwolter at
Wed Feb 12 10:52:01 UTC 2014

I think we should follow the industry accepted terminology.

The NDL is very clear as to what is your NO Decompression Obligation limit.
Very different from the normal ascent rate + safety stop. This last one can
be very well omitted and you will be fine. In the other hand, if you pass
your NDL and you have a decompression obligation (deco-stop) yo *cannot*
omit it without risking to suffer a DCI.

That is the purpose of putting the obscurity in the deco-stop; so people
will pay attention to it and will know that if you run into it, better be
prepared and have the right equipment, training, gas supply, etc. to be out
of it safely.


*Pablo Wolterpwolter at <pwolter at>*

On Wed, Feb 12, 2014 at 10:29 AM, Pedro Neves <nevesdiver at> wrote:

>  Hi all:
> While on the process of helping Willem (and all the others) with the
> Subsurface manual, I keep wondering if we should change the terminology
> that refers to "no-deco" dives (and NDL, etc.).
> I Personally hate the fact that people (and books) refer to some dives as
> "no decompressions dives" when in reality they should be called "minimum
> decompression dives".
> Technically speaking, decompression is a reduction in ambient pression,
> which occurs at the end of every single dive.
> To me, the difference between dives is that some dictate that only a
> "minimum deco" (ascent rate in the region of 3 to 10 m/min and a "safety
> stop") and others dictate one or more "decompression stops".
> Reffering to minimum deco dives as no-deco dives helps, in my oppinion, to
> perpetuate the notion that decompression is a somewhat "obscure" and
> "esoteric" thing that matters only to experienced or "technical" divers and
> that it's relevant only on some of out dives.
> I know this is a controversial issue and I certainly don't want to impose
> my views on anyone, but I'd like to have your opinions on whether to apply
> this view on our manual, or just keep this to myself...
> Thanks in advance:
> Pedro Neves
> _______________________________________________
> subsurface mailing list
> subsurface at
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