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At , Guy Wittig wrote:
>
>My instructor taught me to use 80/20 as per TDI & IANTD training.
>Similarly, to use NOAA tables which don't include air breaks.
>
>So I am trying to work out whether the Florida / WKPP / Stroke-free
>ideas are worth adopting, or should I stick to the TDI/IANTD way of
>doing things.
Guy, everyone who's been bent on the Koputai was using
using 80/20.
That's eight or nine divers now, I'm not quite sure, I
stopped counting for a while.
No-one using 50 and 02 has been bent on it. See a pattern
here?
>At least we have some confidence that
>TDI/IANTD teachings have some reasonable basis - in that they may
>get sued over it and asked to substantiate it.
What you mean "we", Kimosabe?
>I am not a lawyer, but it would be a brave instructor who tells
>a student to run their CNS clock up to 1000% without solid agency
>or industry backing.
No-one was suggesting that.
Your little map points to Sydney. Where do you dive?
rgds billyw
sydney
>> Guy,
>> Read Bennet and Elliot's book on Physiology, there is a section that
>> talk
>> about doing 5 min ari breaks every 20 min, and how they have theoretically
>> run the CNS clock to 1000% (not typo) without incident. They recommend
>> longer air breaks (hopefully not air, but backgas mix) when doing really
>> long hangs at 20'. BTW, your instructor should have taught you this.
>> Errol
>> -----Original Message-----
>> From: Guy Wittig <Guy.Wittig@Au*.Su*.CO*>
>> To: techdiver@aquanaut.com <techdiver@aquanaut.com>
>> Date: Thursday, May 14, 1998 4:54 AM
>> Subject: Airbreaks on O2 deco
>>
>>
>> >We have learned from the list that 80/20 is a "stroke mix", and that we
>> >should deco at no shallower than 6m (20ft) to "open our oxygen window".
>> >
>> >I notice that this just about doubles the CNS loading on the dive
>> profiles
>> I
>> >do. So I guess air breaks are in order. (Assuming one has any air to
>> >breathe)
>> >
>> >If you intend to deco at 6m (20ft) on O2 it doesn't take long to get to
>> 100%
>> >CNS by NOAA tables. Similarly your CNS drops by 50% in 90min so a 5min
>> air
>> >break is going to do zip to reduce your CNS %
>> >
>> >So what is the deal ?
>> >
>> >How do we factor in the CNS affect of air breaks on 100% O2 deco ?
>> >
>> >Do we ignore the CNS clock for deco ?
>> >
>> >
>> >Guy
>> >
>> >
>> >=========================================================================
>> =
>> > ,-_|\ Guy Wittig wittig@us*.ne*
>> t
>> >/ \
>> >\_,-\_+ <- last seen here Sydney,
>> Australia
>> > v
>> >=========================================================================
>----------------------------------------------------------------------
>Guy Wittig 33 Berry Street Phone: 02 9466 9486
>Project Manager North Sydney Fax: 02 9466 9411
>Sun Professional Services NSW Australia Mobile:0419 435 795
>----------------------------------------------------------------------
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