where does everyone position their tank on their back?
Tank Position for the perfect trim
- Thread starter Jorbar1551
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There is no universal right position, just as there is no way to predict weight or where to distribute it. Get your weight close and then finesse the tank as one more adjustment. Also having it where you can reach the valve is a nice touch.
FWIW I put the top of the top cams trap of my Sherwood Avidjust below the crown. Of course I can only go 1-1/2 inches before the bottom strap hits the boot.
Pete
FWIW I put the top of the top cams trap of my Sherwood Avidjust below the crown. Of course I can only go 1-1/2 inches before the bottom strap hits the boot.
Pete
I prefer to have it high enough for me to reach my tank valve.
m3830431
Contributor
Reaching the tank valve is good. As Spec indicated there is no universal positioning. Just a little trial and error.
Agree, reaching valve is primary objective.
One more time in case onyone missed it - being able to reach the valve underwater is a lot more important than using the tank as one of many ways to adjust your trim.
When the day inevitably comes when a well meaning but clockwise/counterclockwise challenged dive master shuts off your air just be fore you jump in, you'll be more concerned with being able to reach the valve quickly than you will be with the effect moving your tank an inch or two lower would have on your trim.
When the day inevitably comes when a well meaning but clockwise/counterclockwise challenged dive master shuts off your air just be fore you jump in, you'll be more concerned with being able to reach the valve quickly than you will be with the effect moving your tank an inch or two lower would have on your trim.
For the life of me, I can't figure out why being able to reach the valve would be a consideration. There's no reason to adjust or close the valve, once you're in the water and not opening the valve before entering the water, kind of negates the purpose of carrying a tank of air, in the first place. 
Put it low enough that you don't bang it with your head, when you look up.
Put it low enough that you don't bang it with your head, when you look up.
I remember about a year ago I was leading a dive. We got to the deepest part of the dive and I started to have trouble drawing air. I knew I had plenty since I had just looked at the SPG a few minutes earlier.
When I examined my SPG to see what the problem was, I saw the needle bouncing down to zero every time I inhaled and I knew what he problem was. I had my tank valve only partially open.
I'm not sure what the signal is for,"open my tank valve" but I am sure the other divers (all newbies) would have been confused and we would have had to air share while fixing the problem.
Instead, I reached back, opened my valve and finished the dive without any of the other divers knowing that it had even happened.
I like having control of that resource.
When I examined my SPG to see what the problem was, I saw the needle bouncing down to zero every time I inhaled and I knew what he problem was. I had my tank valve only partially open.
I'm not sure what the signal is for,"open my tank valve" but I am sure the other divers (all newbies) would have been confused and we would have had to air share while fixing the problem.
Instead, I reached back, opened my valve and finished the dive without any of the other divers knowing that it had even happened.
I like having control of that resource.
all4scuba05
Contributor
I make it a point to never open it partially. This way its second nature to always open all the way. I always breath three breaths while watching spg prior to going down. My sister had a dream that I died underwter. Gonna try my hardest not to make it a vision, it was just a dream. Me being new, have no choice but to be extra cautious till everything is second nature. As far as tank position, I'm only 5'4" and with an AL80, trim has it that I have it too low too reach the valve with my short arms.
I thought trim was the more important vs valve access?
I thought trim was the more important vs valve access?
all4scuba05:
IMO no, it is not more important than valve access. There are other ways to adjust trim with weight placement. So the 2 do not have to be mutually exclusive.
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