Double Bogey - Category A breathing aperatus is defined as a system that can be deployed under water. The Hybrid system we use in the North Sea CAN be deplyed under the water if necessary - so the new regs dont actually mean anything in my opinion. It depends on how they actually decide to class the Hybrid system because at the moment (according to their own literature) it is Class A - but they dont say that.... Probably to make it look like they are making steps to change when they are really not.