Ascend rate from 5m [was: Re: Things that don't work right now]

Dirk Hohndel dirk at
Tue Sep 17 06:22:11 UTC 2013

On Tue, 2013-09-17 at 10:52 +0200, Robert Helling wrote:
> On 17.09.2013, at 01:57, Dirk Hohndel <dirk at> wrote:
> Hi,
> > Hmm - I am wondering if maybe we are misunderstanding the
> > recommendation. I haven't seen it in its technocratic German beauty, but
> > if I look at my profiles from today I did in fact take 5 minutes from
> > 5m. I spend 3 minutes at about 5m and then 2 minutes coming up to the
> > surface for a total of 5 minutes for the last 5m. Is that what they are
> > talking about?
> you find it here on pastes 6--7. 

Ok, that makes more sense. That's exactly the 'safety stop plus final
ascent' that I mention above. I can agree with that. 2 min for the last
5m takes a lot of buoyancy control but is doable and combined with the
safety stop it gives you those 5 minutes.

Of course you can get the same with a 4:50 safety stop and then popping
to the surface in 10 seconds which I think is not what the authors had
in mind... so the way it's written is really stupid. 

Call it "3 minute safety stop and 2.5m / min final ascent to the
> For typical sports diving it does not really matter how you implement
> it. But it comes from the DIR diving community that has been practicing
> a similar rate for trimix diving for quite some time, see
> first
> page with content.

Let's not get started on a DIR discussion here. I would like this
community to remain friends.


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