the_one_who_waits
Registered
Let's say you are doing a 2-tank dive on doubles with a group where some are on singles and some (or only you) are on doubles, so you have the benefit of not needing swap tanks between dives. During the 2nd dive, if the leader/guide does a pressure check, how would you convey your remaining gas? Because if you signal what's on your SPG/AI-computer, there is the possibility it is interpreted as having significantly less gas (volume) than you actually do. While of course a good leader/guide should be able to differentiate between single and double pressures, and this all should be addressed pre-dive, it may not always be the case when there may be a lot going on and to keep track of.
Example scenario: everyone is diving same volume tanks and have the same SAC rate. You ended the first dive with 2000psi/140bar in your doubles. So you start your second dive with that much, and those on full singles start with 3000psi/205bar. After a while, the leader/guide does a pressure check all around. At this point, you and everyone has consumed the same volume of gas. Whereas your gauge may show 1250psi/85 bar, theirs will be at 1500psi/103 bar. Because of the reserve gas from the first dive you're carrying over, the two pressures are not drastically different such that the leader/guide may not to think beyond the erroneous conclusion that you are consuming gas very fast and remainder of the dive may need to be altered or ended much sooner.
Would you just go ahead and signal your remaining pressure and risk ending the dive ~20 minutes sooner? Could you signal twice your PSI to maintain semi-parity with those on singles?
Example scenario: everyone is diving same volume tanks and have the same SAC rate. You ended the first dive with 2000psi/140bar in your doubles. So you start your second dive with that much, and those on full singles start with 3000psi/205bar. After a while, the leader/guide does a pressure check all around. At this point, you and everyone has consumed the same volume of gas. Whereas your gauge may show 1250psi/85 bar, theirs will be at 1500psi/103 bar. Because of the reserve gas from the first dive you're carrying over, the two pressures are not drastically different such that the leader/guide may not to think beyond the erroneous conclusion that you are consuming gas very fast and remainder of the dive may need to be altered or ended much sooner.
Would you just go ahead and signal your remaining pressure and risk ending the dive ~20 minutes sooner? Could you signal twice your PSI to maintain semi-parity with those on singles?