I had an almost identical experience last night. The instructor took
some time explaining that diving a training site once in the morning on
air and again in the afternoon on trimix was like diving on two
different sites. He was uncomfortable with the site he saw in the
morning and had pretty much come to the conclusion after thinking about
the experience there was no reason to go back to the mornings dive site.
He also pointed out the sections in the "Deep Air" manual related to gas
management and said that demonstrated competence with this was a
prerequisite for any technical/extended range diving and completion of
his divemaster program. Simply in the conversation we had he expressed
that he personally isn't interested in participating in deep air let
alone the instruction of it.

I'm also going to withhold the instructors name to help ensure he
doesn't face reprisal.

I'm guessing that TDI will drop deep air as soon as they complete a
trimix manual that has gas management in it and sell off the remaining
copies of their Deep Air Literature. I suppose it could be a race with
getting sued out of existence though.

>-----Original Message-----
>From:	Jim Cobb [SMTP:cobber@ci*.co*]
>Sent:	Wednesday, October 08, 1997 6:20 AM
>To:	Techdiver; Cavers Mailing List; George Irvine; William
>Subject:	Re: Winning the Deep Air War
>
>I went into our local TDI shop last night to chat with the owner. I 
>talked to him about what if a diver wanted trimix instruction without the 
>deepair crap.
>
>He said that the deepair class was basically instruction on air 
>consumption, gas management, gas switching, tables, etc. The trimix part 
>was really easy, and just a short add-on to the deepair class, and he saw 
>no problem with rolling the two classes together and skipping the deepair 
>dives, if that's what the student wants.
>
>I guess this shows that the word is out about deepair. He does not hang 
>out on the internet, so he figured this out on his own. I don't know what 
>he teaches insofar as gear config and decom schedules, but I know him and 
>think that he would teach the best way as he knows it rather than the TDI 
>way.
>
>   Jim
>
>On 10/8/97 5:37 AM Paul Harris wrote:
>
>>Ewan says:-
>>
>>>I was lucky to have an excellent instructor (TDI, no less) who trained me
>>>without insisting on deep air practical stuff.
>>>
>>>Here, in the UK, most divers are BSAC, which frowns upon diving deeper
>>>than 50 metres (167 fsw), but doesn't accept trimix at all. Ex-buddies
>>
>>>In order to highlight the dangers of deep air to everyone, we have to win
>>>over the training bodies by reasoned argument. Some are receptive some
>>>aren't, so there's a challenge.
>>
>>I'm in a similar situation, the instructor I have used for Adv and Tech
>>Nitrox is not going to make me take Deep Air as a prerequisite for Trimix.
>>As I need a card to buy the stuff I don't care what logo is at the top - It
>>is the instructor I trust - he is in my mind of the 'good guys'.
>>
>>The current situation makes me reluctant to name him because I don't know if
>>we HAVE to do the deep air stuff according the the organisations'
>>instructions and therefore put him at risk of having his instructor ticket
>>pulled (if that is possible).
>>
>>It may be that as he knows me, knows the type of diving I do and therefore I
>>that am one of the converted. I don't WANT to do any more deep air diving
>>because I know that there is a viable alternative.
>>
>>regs
>>Paul
>>
>>
>>
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>
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