I have to say something about using dry suits for buoyancy control.
Lots of divers are taught to do this. Are CG and/or Navy divers taught that?
If you are nearly neutral it works because about the time you relieve squeeze by adding air to the suit on descent, you are neutral. However, if you are heavy, whether because of balast or just big tanks with lots of air, it doesn't work well at all. If you have very much air in the dry suit and get in a head up orientation (out of trim) it will just burp out the neck seal and DOWN YOU GO!
Lots of divers are taught to do this. Are CG and/or Navy divers taught that?
If you are nearly neutral it works because about the time you relieve squeeze by adding air to the suit on descent, you are neutral. However, if you are heavy, whether because of balast or just big tanks with lots of air, it doesn't work well at all. If you have very much air in the dry suit and get in a head up orientation (out of trim) it will just burp out the neck seal and DOWN YOU GO!