Not debating this at all.  Not sure who's response you're responding to.
If it was mine then as I said, deco diving on a single and pony was not
one of my brightest moments.  That's why I doubled up my 120's.

Art.

	-----Original Message-----
	From:	George P. Wentland [SMTP:wentland@ns*.ac*.no*.ed*]
	Sent:	Friday, January 15, 1999 8:25 PM
	To:	Paltz, Art; 'Art Greenberg'; Scaleworks@ao*.co*;
cobber@ci*.co*; Rubrifolia@ao*.co*; Wahoojan@ao*.co*;
techdiver@aquanaut.com
	Subject:	RE: useful pony bottles ( was which course&
school)

	If you are doing required stop dives with a single it would be a
real good
	idea to bring a pony. Not a little one either. The pony should
be large
	enough to permit the return trip to the line and any required
deco. If you
	try to get by with less you are risking your neck bigtime.
		The other day I filled my HP 100 cu.ft. tank with 3500
psi.. I put the tank
	on the boat in the shade. In about half an hour it started to
leak from the
	tank O-ring (the O-ring between the tank and the valve). After
leaking for
	about 2 min. half the O-ring blew out. I have never seen one of
these
	O-rings blow before. It was visualed and the O-ring was replaced
by myself 4
	mo. ago.
		If this occurred at depth the air would have drained out
but quick and if
	this was your sole air supply with a Y valve, you better find a
buddy with
	lots of air to save your butt.

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