02 Sep 95 19:20, Helene Mainville wrote to Roland Stephens:
 HM> Hi Roland, I'm not sure if you should buy a special regulator for colder
 HM> waters. The practice here is to do so if one plans to dive under ice or 
if
 HM> the air is below freezing. I would think that below freezing temperature
 HM> could create problems. I have not tried cold winter diving yet. Maybe,
 HM> when I'm old enough to not feel anything! H‚lŠne.
The air doesn't have to be at or below the freezing level to be able to 
freeze up a regulator.  Moisture present above the freezing level may freeze 
if the regulator is tested prior to the dive by depressing the purge button.  
As the pressure drops across the venturi, the temperture will also drop.
I avoid all this by diving in the Caribbean.
Jay
PADI M-9033
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