This specification covers the requirements for a p o s i t i v e
pressure, chest mounted r e g u l a t o r . This r e g u l a t o r w i l l be used as part o f an
a i r c r a f t on-board oxygen generating system (OBOGS) or an a i r c r a f t l i q u i d
oxygen system (LOX) t o p r o v i d e b r e a t h i n g gas on demand.