din7
Contributor
who was your LDS? I learned 1 finger per 100lbs, like 5+5+4 for 1400. most of the other methods are head scratchers.
How do you signal air remaining?
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who was your LDS? I learned 1 finger per 100lbs, like 5+5+4 for 1400. most of the other methods are head scratchers.
Marek K
Contributor
As I hope I pointed out when this thread was active in 2005 
, there are indeed a lot of ways of doing this. And even the "standardized" European way...isn't quite so standardized. Does the "time out" signal mean 100 bar, or half a tank remaining (which is what the Europeans always told me), or half of usable pressure remaining?
Important thing to learn is, this is one of the things that have to be agreed on when the dive plan is discussed, if you're going to communicate pressures. Underwater is a bad time to be figuring out what the other guy's signals mean.
By the way, I learned back in 1985 to do one finger for each 100 psi -- and you could use both hands. Ten fingers, then four fingers means 1,400 psi.
, there are indeed a lot of ways of doing this. And even the "standardized" European way...isn't quite so standardized. Does the "time out" signal mean 100 bar, or half a tank remaining (which is what the Europeans always told me), or half of usable pressure remaining? Important thing to learn is, this is one of the things that have to be agreed on when the dive plan is discussed, if you're going to communicate pressures. Underwater is a bad time to be figuring out what the other guy's signals mean.
By the way, I learned back in 1985 to do one finger for each 100 psi -- and you could use both hands. Ten fingers, then four fingers means 1,400 psi.
OP
I neglected to mention that there is one very large problem with doing the fingers on the arm signaling here ... black gloved fingers on a black wetsuit arm, does not a signal make
... one of the things stressed by the instructor was to hold your hand out to the side when signaling, and not in front of your body .. again because black in front of black is not very clear
or use smoke signals
I've always dived in metric - it seems to be the more common system in the various parts of the world I've dived in. The first time PSI-divers outnumber Bars was when I went to Cozumel last year.
Signals I normally use
Out of air - Cut across the throat
50 bar - pounding on the chest with fist
60 to 90 bar - the 50 bar gesture followed by a finger for each ten so 70 bar would be fist and two fingers
100 bar - is half so the T-sign with two hands
110 to 190 bar - half gesture followed by a finger for each ten bar
There are variations but as long as both buddies or all group members/guide have an established system, it's OK
When in doubt or if you have a nervous or inexperienced person, it's best to check the gauge, just in case.
Signals I normally use
Out of air - Cut across the throat
50 bar - pounding on the chest with fist
60 to 90 bar - the 50 bar gesture followed by a finger for each ten so 70 bar would be fist and two fingers
100 bar - is half so the T-sign with two hands
110 to 190 bar - half gesture followed by a finger for each ten bar
There are variations but as long as both buddies or all group members/guide have an established system, it's OK
When in doubt or if you have a nervous or inexperienced person, it's best to check the gauge, just in case.
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