2.1 An EEBD is a supplied-air or oxygen device
only used for escape from a compartment that has a hazardous atmosphere
and should be of approved type.
2.2 EEBDs are not to be used for fighting fires,
entering oxygen deficient voids or tanks, or worn by fire-fighters.
In these events, a self-contained breathing apparatus, which is specifically
suited for such situations should be used.