emoe1973
Registered
This is my View on this.
The turn half/quarter back is to ensure that the valve doesn't get stuck in the OPEN position.
This is absolute rubbish! An open valve that's stuck is not an issue at all. You wait till the cylinder is emptied and then have the valve repaired/replaced.
What IS an issue is a valve that is stuck CLOSED! what you gonna do then? 232 bar with no way to get it released!
more importantly is this, and it HAS HAPPENED.
An instructor doing a buddy check with a student asks during the BWRAF if the air is on. The student feels the valve and turns it all the way OFF, then back on a half turn. At the surface this gave enough air to continue registering on the SPG. The two breaths taken at the surface didn't feel bad at all.
Upon entering the water and descending, the instructor finds that the air is not ON and is having difficulty pulling air through the reg. The student stares WIDE EYED at the instructor because he is giving OUT OF AIR, and the student backs away because he don't know what the heck is going on!
This ACTUALLY HAPPENED.
therefore in our school, air is TURNED ALL THE WAY AND NOT BACK BY ANY AMOUNT. if the gauge reads and you can pull air, then its on. If not Its OFF!!
Simple! and impossible to screw up!
The turn half/quarter back is to ensure that the valve doesn't get stuck in the OPEN position.
This is absolute rubbish! An open valve that's stuck is not an issue at all. You wait till the cylinder is emptied and then have the valve repaired/replaced.
What IS an issue is a valve that is stuck CLOSED! what you gonna do then? 232 bar with no way to get it released!
more importantly is this, and it HAS HAPPENED.
An instructor doing a buddy check with a student asks during the BWRAF if the air is on. The student feels the valve and turns it all the way OFF, then back on a half turn. At the surface this gave enough air to continue registering on the SPG. The two breaths taken at the surface didn't feel bad at all.
Upon entering the water and descending, the instructor finds that the air is not ON and is having difficulty pulling air through the reg. The student stares WIDE EYED at the instructor because he is giving OUT OF AIR, and the student backs away because he don't know what the heck is going on!
This ACTUALLY HAPPENED.
therefore in our school, air is TURNED ALL THE WAY AND NOT BACK BY ANY AMOUNT. if the gauge reads and you can pull air, then its on. If not Its OFF!!
Simple! and impossible to screw up!