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Stuart, 

I took my ANDI Instructor course from your president (Ed Betts) in 1990.  I
also took Ed's first Tri-mix course, so this posting is VERY ACCURATE. 

Ed's nitrox course and Tri-mix course was nothing more than an equipment and
retail sales pitch. In fact, after Ed's tri-mix lectures, I advised the
students in the class that I would not be making the dives as the class did
not prepare anyone for the dives. Ed did not even provide, or have, tables
for the dive. We took the class, prepared to go diving the next day, and had
still not ever seen a table. I told Ed, privately, in his office, that his
class did not prepare any of us for the dives. I also told Ed that I was
advising the others not to dive also.

Part of Ed's lecture during his nitrox program was in fact stating that you
could use 50/50 as a bailout even if the dive was at 130fsw because if
switching to bailout, you would be on your way up. 

As a local competitor of Ed, I have many of his customers, as I am sure he
does of mine, come in to my store. This practice of 50/50 bailout is still
being taught, or somehow suggested, to his and Island Scubas students. I
know, I talk with all of his students when they come to my store for a 50/50
fill and they are diving on the Oregon in 130fsw.

That is not to say that all ANDI Instructors are bad - I am sure their are
plenty of good ANDI instructors that teach the course properly. 

Raimo.

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