Seven Breaths Guarantees Your Air Is On
1. When you go on a dive boat that services single tank divers the DM, Deck Hand, Captain, Instructor, Tank Valve Turner will check your valve is on before you jump in the water. Let him/her do his job. The first few times they do it you are thankful, then after you become an expert (AOW or more certs) you may start to resent it, then once you become a seasoned diver you will appreciate it.
2. When you go on a dive boat that services technical divers, ask ahead of time if the DM, Deck Hand, Captain, Instructor, Tank Valve Turner are fully familiar with your manifold system. If so then Let him/her do his job. (f not take a moment to simply show them what you like) The first few times they do it you are thankful, then after you become an expert (AOW or more certs) you may start to resent it, then once you become a seasoned diver you will appreciate it.
3. and this is the BIG one ......... even if you have adhered to # 1 or # 2 you should do this. Follow carefully as this guarantees regardless of your size, your breathing capacity, or the length of your hose (up to 7 foot) that as the end of this simple exercise you will know without a shadow of a doubt if your PRIMARY regulator is ON or OFF
(practice this at home)
A. Take a pause before standing up and jumping in the water.
B. Put regulator in your mouth. (DO NOT PRESS PURGE BUTTON )
C. Pick up Pressure Gauge and look at it.
D. Take 7 FULL inhalations off that regulator. (takes 10 seconds)
IF you still have air/gas on 7th inhale and the needle on the SPG does not move -- VALVE IS OPEN GO DIVE
IF you seem to have run out of something to inhale on before the 7th inhale and the needle moves -- VALVE IS CLOSED -- STOP and OPEN IT and REPEAT EXERCISE.
It's not 2 or 3 or 4 or 5 or 6 ....... it's 7.
In the mid 1990'sNYC Wreck Diver Tony Smith died because his tank valves were closed as he did a back roll off the Atlantis V in North Carolina. He sank to the bottom with his lungs being crushed and his face mask sucked into his face because he was overweighted and his AIR was not ON. He was found at the end of the dive in 145 feet of water when the mate went in to untie the anchor line from the wreck. Tony was a friend of mine. Since that time I have performed the above process on EVERY dive I have done, regardless of where, pool, lake, ocean, cave etc. Fortunately the few times I was rushed or distracted on the deck I was able to catch the error. Every diver I train learns this, every diver I meet with gets to see it /hear it, some ask and I will explain.
So, you do your part by showing crew that you know what you are doing and also let the qualified crew "check your valves" if that makes them happy. You can then take another 10 seconds of precious dive time and do the exercise AGAIN then there is NO question in your mind at to whether or not YOUR air is on.
Cheers