| Er......some one will correct me if I'm wrong ( please! ) but this is my understanding of it.....
The things mentioned above plus:
Its useful if you are planning to be doing three or more dives a day on a liveaboard - longer bottom times, less SI needed, etc.
Its a great way of squeezing a morning dive out the day before flying home from somewhere - depending on O2 loading and other variables - better make sure your Comp is set to 21% for the air diving for the entire holiday so it tracks your O2. |