SPG position? On the left? Why?

[String]

Its possible with descending a shot line if the line is rubbing the valve on the way down.

 

[Kingpatzer]

I route mine under my left arm, across my chest, and clip it to the right shoulder d-ring.

To see it i just look down.

And I can shine a light towards it with whatever hand happens to have a light at the time.

*shrug*

 

[PfcAJ]

Not to hijack the post but has that ever happened? I know people say it a lot, and it is de rigeur as part of technical training, but I just cannot ever envisage a situation where the mechanics are such that one could bump the ceiling of a cave so often that something as stiff as a manifold would rotate three full circuits and close.

Its a real thing.

 

[rjack321]

Not to hijack the post but has that ever happened? I know people say it a lot, and it is de rigeur as part of technical training, but I just cannot ever envisage a situation where the mechanics are such that one could bump the ceiling of a cave so often that something as stiff as a manifold would rotate three full circuits and close.

Yes it happens. Three rotations of the knob can occur in as little as ~30cm, 18" of continuous contact with a ceiling or up/down line.

 

[TSandM]

If you go to cavediver.net, there is a section called IRAP that is a set of anonymous reports of "near misses and lessons learned". There are several stories in there that involve roll-offs. I personally have been startled by how much my left post has turned in the process of getting through a couple of restrictions. It has never rolled all the way off, but that's because I religiously check it after every contact with the ceiling.

 

[ScubaVideo]

Not being a cave diver, I'm wondering why a locking system has not been developed to keep valves from rolling off?

 

[PfcAJ]

Because that would prevent you from shutting them down quickly when you need to.

The roll off issue is easily fixed by reaching back and opening it If you touch the ceiling, you check the valves.

 

[Valery]

I found it very stupid to clip the spg on your left hip d ring and to clip and clip each time you want to check your gaz level. I never put it there, instead I clip it on the left shoulder d ring, this way I just have to look down to check my spg without even touching it.

Now that was impossible to do with 2 stages clipped on the same shoulder d ring. So I had no other choice than putting the spg on the right post. So I did it and clipped it on the right shoulder d ring and was again a happy diver. Until 1 guy here mentioned why the spg was to be left on the left post, it's because if you forget your left post or your manifold closed you will notice it if its on the left post but not if it's on the right post.

So no other choice than to put it back on the left post but to be able to check it without having to touch it I just use the same routing as the drysuit inflator : under the left shoulder and the left bc pad to my chest.

Hope this help.

 

[lamont]

Not to hijack the post but has that ever happened? I know people say it a lot, and it is de rigeur as part of technical training, but I just cannot ever envisage a situation where the mechanics are such that one could bump the ceiling of a cave so often that something as stiff as a manifold would rotate three full circuits and close.

Yep, I know someone who went on their backup instead of their primary at a switch on exiting a cave and got nothing.

It was also involved in a fatality a few years ago... can't find the record though, but it should turn up with enough google foo...

 

[rjack321]

I found it very stupid to clip the spg on your left hip d ring and to clip and clip each time you want to check your gaz level. I never put it there, instead I clip it on the left shoulder d ring, this way I just have to look down to check my spg without even touching it.

Now that was impossible to do with 2 stages clipped on the same shoulder d ring. So I had no other choice than putting the spg on the right post. So I did it and clipped it on the right shoulder d ring and was again a happy diver. Until 1 guy here mentioned why the spg was to be left on the left post, it's because if you forget your left post or your manifold closed you will notice it if its on the left post but not if it's on the right post.

So no other choice than to put it back on the left post but to be able to check it without having to touch it I just use the same routing as the drysuit inflator : under the left shoulder and the left bc pad to my chest.

Hope this help.

if your profile is accurate and you have less than 100dives you have no business diving 2 stages.