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At 4:23 PM 9/19/95, Curt Smitka wrote:

>Why? - Pony Gauges

[snip]

>As an unmanaged gas source the gas volume is checked prior to the dive and
>assumed to be available if needed during the dive.  To insure this the
>valve is normally (or should be) closed during the dive and opened if the
>gas source is needed.

I've had a competing recomendation made here.  My instructor recommends
the method you outline (gas off on pony until needed), since it eliminates
the risk of an unnoticed freeflow on the pony reg.  Another diver suggested
the problem with this approach was the posibility of drawing water into the
unpresurized low pressure hose.  I don't have enough experience to counter
this, do you have any thoughts?

I've rigged both of my pony bottles upside down so I can easily reach
the valve, but since this warning I've been uncomfortable with leaving the
valves off.

Thanks,
Scott.

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