For the same reason your lungs do not inflate if you purge the reg while in your mouth. The purge valve. If you were to block the purge valve there would be a serious risk of lung over-expansion.
Not exactly on topic, but you brought it up. I'd love to hear "a lot of reasons" to ditch weights, especially at depth.
I would suggest that you try the ESA before you go for the uncontrolled Emergency Buoyant Ascent when you do have ditchable weight.
There is NO excuse to ever run out...
No. You only do it once. I got that method from the guy at Blue Grotto in Florida. He and a partner designed and build (I think he just sells them now) the boxy style of halogen canister lights that use the test tubes. I had lost both my main and my spare tubes due to them popping off (I...
There isn't much in the way of shore diving in these parts. I'm in wreck territory! ;)
I wish I had the $$ to go where I could shore dive. Here, you hit your turn pressure and you start up the line.
Joe
" The sports bar formerly known as Jimbo's "
The dugout
The bullpen
The penalty box
The Winners circle
Trophies
The sweatsock
The place we refused to call the sweatsock
Joe
Things aren't lining up correctly in my head on this. There are several schools of thought on weighting:
Neutral at 15' with 500psi
Neutral at surface with 500psi
Then we have Rock Bottom pressures. Using this you should never be at 15' or the surface with only 500psi unless you had to...
Take a strand of heavy fishing line and stick one end into the new test tube. Slide the new TT over the light then pull out the line. This will allow excess air to escape as you push the tube over the O-rings. If you don't do this you will build up pressure inside the TT as you push it on...
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