Quote: (Originally Posted by jholley)
That actually helped quite a bit.
What is different about buoyancy control?
The buoyancy is different because you are breathing into and out of a bag. With OC as you breath in you displace more H2O and therefore become more buoyant and as you exhale you displace less and become more negative. In a Rebreather the amount of H2O you displace does not change with every breath so your buoyancy stays the same. In fact it is easier to attain neutral buoyancy with a RB because of this fact.
