Quote: (Originally Posted by
Icarusflies)
Hello All;
I was surprised to read that level 1 units do not have a manual 02 / diluent addition. I thought that most rebreather divers dived their units manually and used the electronics as back up. Steve
Speaking from the Ouroboros standpoint I am suprised when you state that there is no manual O2/Dil add on the Sentinel (this would fail a CE approval???) but can firmly state that with the Boris the electronics controls the ppO2 to a level selected by the diver and the diver maintains a regular (1 per min) check on everything via the display that gives all 3 cells values.
Speaking personally I would only do manual addition during periods when the ppO2 was changing rapidly or when I decided that the electronics was hosed and chose to go to manual control (having bailed out first).
The bottom line is that having spent thousands on electronics most people wouldn't then do the job themselves. If you are determined to do manual ppO2 control as your primary then maybe it is better to simply not have the electronics. In my mind this is akin to am OC diver buying a dive computer and then planning all their deco on tables. In the end there is sure to be conflict.