OK, I got you now!  Thought you were doing this on every dive.  Now I'll
sleep better at night!!  :-)

Safe diving,
Art.
art.paltz@r2*.co*
Last Dive 1/10/98, Klondike Rocks (lobster dive), 
    NJ 75ft/65 min bottom time, 43 degrees F, 40% bottom mix.
    Damn Weather!  And we were doing so well for a while there!!


	-----Original Message-----
	From:	David Shimell (shimell) [SMTP:shimell@se*.co*]
	Sent:	Monday, January 26, 1998 11:39 AM
	To:	'Jim Cobb'; Paltz, Art
	Cc:	Tech Diver
	Subject:	RE: Pony Bottles


	Art

	Hmm, I guess I was not clear enough.  Only use your pony in
emergencies.   
	 If you are going to use your pony due to some incident
occurring, you   
	want to do this switch before your primary is exhausted, so as
to confirm   
	that the pony is working.  Where you set this reserve can be
debated but   
	I argue that you have already planned to be on the boat with a
certain   
	reserve in your primary, then this is the point to switch to
your pony.   
	 So, with barring unearned incidents you should always be on the
boat   
	with at least your primary reserve and your pony untouched.

	David Shimell
	Project Manager, Sequent Computer Systems Ltd, Weybridge, UK
	Email: shimell@se*.co*

	 ----------
	From:  Paltz, Art[SMTP:Art.Paltz@R2*.CO*]
	Sent:  26 January 1998 11:17
	To:  'Jim Cobb'; David Shimell (shimell)
	Cc:  Tech Diver
	Subject:  RE: Pony Bottles

	I agree, scares me too!!  I won't debate the usefulness of
Ponies as I
	have my own opinion and don't wish to throw it into the mix.  I
thought
	the practice you were referring to was only done with doubles?
The idea
	of breathing off the pony when not in an emergency scares the
hell out
	of me.  I guess you guys get it filled each time when you
re-fill your
	mains?

	Safe diving,
	Art.
	art.paltz@r2*.co*
	Last Dive 1/10/98, Klondike Rocks (lobster dive),
	    NJ 75ft/65 min bottom time, 43 degrees F, 40% bottom mix.
	    Damn Weather!  And we were doing so well for a while there!!


	        -----Original Message-----
	        From:   Jim Cobb [SMTP:cobber@ci*.co*]
	        Sent:   Monday, January 26, 1998 9:42 AM
	        To:     David Shimell (shimell)
	        Cc:     Tech Diver
	        Subject:        RE: Pony Bottles

	        David-

	        You are basically describing diving with independant
doubles, a
	        horrifying practice which is still championed by you
Brits and
	other
	        Europeans.

	        But I understand that a Hogarth revolution is taking
place over
	there,
	        much to the dismay of the ID (stroke) crowd. I hope you
all
	don't get
	        stuck on tradition over there.

	        By the way, what you describe below scares the bejeezus
out of
	me. Are
	        you sure you worded this correctly?

	           Jim


	        On 1/26/98 7:50 AM David Shimell (shimell) wrote:

	        >BSAC train the following practice.  Breath your primary
supply
	down to
	        >the reserve level (i.e. the pressure at which you
planned to be
	back on
	        >the boat), then switch to the backup supply (pony in
this
	case).  This
	        >ensures that the reserve in your primary remains intact
at this
	point and
	        >that the correct functioning of the pony is confirmed.




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