The Kirby Morgan® Rebreather POD, also referred to in the past, as the NATO POD, with switch over regulator is designed to be used in operation with the Kirby Morgan® M-48 MOD-1 and SuperMask® modular full face masks. Bailing out to an off-board gas and going off the “loop” or switching gasses underwater is as simple and straight forward as turning a handle on the front of the POD. This Modular design also allows the diver to release the POD underwater to accept alternate air sources without ever removing the mask.