I think you meant 90B = Fist + 4 fingers.....
So for 180 Bar / T - Fist - 3 Fingers
For 140 Bar / T - 4 Fingers
For 90 Bar / T - 4 Fingers
...
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I think you meant 90B = Fist + 4 fingers.....
So for 180 Bar / T - Fist - 3 Fingers
For 140 Bar / T - 4 Fingers
For 90 Bar / T - 4 Fingers
...
I think you meant 90B = Fist + 4 fingers
....and it also reinforces that the best thing to do is decide which method will be used BEFORE they go under. This way even when diving with a stranger they know what to do. One of the first questions I tell them to ask instabuddies or someone they may know but have yet to dive with is what signals they will use.
And that is just what we (Buddy and I) were doing, BDSC. Worked fine until our sphere of dive buddies grew a bit to include those with differing experiences. The number communication method was just not discussed pre-dive. (Dang! 5510 psi left, I want one of those fills next time!)
As you get more advanced in your dive abilities, you probably would not be looking to know approx how much air your buddy has, ok or not ok is more than good enough. However, at my current level I kind of like to know and I like to know that he knows, what is left in the gas tank(s).
With that in mind, what other numbers would need to communicated accurately without having to break out the slate? Compass heading maybe? Depth?
Occasionally these different groups buddy up.What is noticeable to me is that there seems to be a difference between the Psiotypes and the Barotypes.
We are I think trying to re-invent the wheel.
Cave divers routinely communicate psi remaining, and things like "Ascend to 20' for a deco stop of 3 minutes" and they do it in a manner that is simple and consistent. I have not had probems diving with cave divers from all over the country and even from other countries as the signals are standardized.
That avoids the need to try to negotiate signals pre-dive and then try to remember strange signals during the dive. Not having standard signals creates the near certain potential for confusion and miscommunication especially under stress.
For example if you as a recreational diver flash me 2 or 3 handfulls of 5 fingers, I, as a cave diver am going to locate and turn off one of my back up lights, since you just told me it was on. Then I might even point at my SPG to see how much gas you have left.
I'm not saying the cave diving hand signals are better (well...thats a lie - they are a lot better as they are part of a larger system and they have a track record of working in very demanding and stressful conditions and can be done one handed) but they are well established and staqndardized. What are the issues that would prevent recreational training agencies from just adopting them as an industry standard? It would improve communication, especially with insta buddies and it would save lives.