Cam, the second pressure gauge is completely unnecessary since, if you
lose the left post or have to isolate, the dive is called anyway. 
Knowing the pressure at this point serves no purpose as it would not
change your actions.  If you are managing gas properly and diving with
buddies who have comparable gas consumption rates to yours, just look
at a buddy's gauge.  Also, you should be able to estimate your gas just
by knowing your breathing rate and the runtime.

The drysuit inflator (if you are not using argon) comes off the left
post and straight down, under the harness strap to the inflator. 
Hearing gas moving through the hose, as you would if it crossed around
to the right side, is not so much of an issue with the suit inflator as
it is with regs, since if it is leaking you will notice because your
buoyancy increases.  Doing it this way there is only one hose crossing
behind your head from the left post, so if you ever need to reach
behind to recover your backup reg, you will not confuse the hoses.

-Sean



On Tue, 30 Nov 1999 21:25:22 PST, Cam Banks wrote:

>Having just spent several hours re-rigging my doubles regs, I hope I have it 
>right.  I'm sure someone will tell me...
>
>Right Post(the one on the diver's right, with tanks on):
>* long hose primary reg w/clip
>* BC power inflator hose
>
>Left Post:
>* single pressure gauge, with clip for hip d-ring
>* drysuit inflator hose
>* short hose backup reg w/necklace
>
>Hoses and 1st stages so they do not impede access to either tank knob or 
>isolator knob.
>
>Question: So, the drysuit inflator hose does not cross behind the head, 
>correct?
>
>You'd think that of the many sites somewhere this would be illustrated 
>absolutely clearly, but I couldn't find one.  Tried Cobb's, Leonard's, 
>Sallot's, WKPP, Halcyon, etcetera.
>
>Someone tell me the reasoning for one pressure gauge only, and it being on 
>the left post please?  I guess that:
>* if it doesn't move, you know to check the valve is open
>* if it moves too fast, you know to check the isolator is open
>* if you have to shut off primary, or isolate, you are on your backup reg, 
>so it's nice to know pressure for that side while you are aborting the dive
>
>Thanks.
>
>Cam
>
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