Question About Doubles Config and SPG(s)

[Michael Guerrero]

Is there any reason not to put an spg on both posts in doubles? If you have to shut the left post you lose your ability to monitor gas quantity right?

 

[Superlyte27]

It's a source of failure. If you lose your left post, the dive is over anyway. If you've planned your dive properly, there's enough gas to get you home. You don't need to know what the pressure is, just knowing that it's enough, is enough.

 

[EMiles]

There is no need to have it. If you have that sort of failure you should be ascending/exiting. You don't need to know pressure because 1) you planned you gas adequately I.e. thirds and 2) its all the gas you have to use regardless of pressure.

Sent from my DROID RAZR using Tapatalk 2

 

[Nwcid]

I agree with the above.

Right now I am just getting started with my doubles and still doing recreational stuff. I have a AI computer so I put the transmitter on my right post at a downward facing angle. Using the AI is very nice for doing my dive log, downloads that info too.....

 

[elan]

depending on the failure you might still be able to monitor your pressure. That might cost you some gas though.

Is there any reason not to put an spg on both posts in doubles? If you have to shut the left post you lose your ability to monitor gas quantity right?

 

[DaleC]

Depends on what you mean by doubles and/or how you intend to dive them.

 

[captain]

Depends on what you mean by doubles and/or how you intend to dive them.

I think I know what you are thinking but most divers certified after 1980 know only one kind of doubles, those with two post and two regulators.

 

[Bob DBF]

I think I know what you are thinking but most divers certified after 1980 know only one kind of doubles, those with two post and two regulators.

One of my doubles should really be confusing, two posts (one center, one right side) and the J valve, by Sherwood. Dive the Double Hose with all the amenities, should I desire.



Bob
-------------------------
I may be old, but I’m not dead yet.

 

[Michael Guerrero]

I mean doubles where you have two tanks, banded together, sitting on your back, with a(n) (isolator) manifold connecting them. Turning off the left post means you lose the left 1st stage, and that's often where the SPG is connected.

Copy all on the gas planning. I suppose if you close the post fast enough you'd have minimal gas loss and should have a good idea of what's left and what you need to surface.

 

[BabyDuck]

what you have is what you have. what are you going to do to get more?

put one on if you'd like. it won't really hurt anything, it's just wearing a belt and suspenders, but it's not really important info at that point.