How quickly conditions are deteriorating
Ease of egress, including travel time to a
breathable atmosphere
Operating times for each device
Capabilities and limitations of each device
WARNING
Don’t breath through the nose—breath only
through the mouth when using the SEED.
WARNING
SEEDs must not be used for firefighting
purposes.
OXYGEN BREATHING APPARATUS (OBA)
The oxygen breathing apparatus (OBA) (fig. 12-5)
is a self-contained device that generates oxygen through
a chemical process and lets the wearer breathe
independently of the surrounding atmosphere.
Currently, the OBA is the primary tool used by
firefighting teams for respiratory protection. The
effective time limit of the oxygen supply is in excess of
12-16
Student Notes:
1.
2.
3.
4.
Facepiece
Breathing tubes
Breathing tube couplings
Body harness and pad
5.
6.
7.
8.
Breathing bag
Breastplate
Waist strap
Bail assembly handle
(standby position)
9.
10.
11.
12.
Canister release strap
Pressure relief valve and
pull tab timer
Timer
Valve housing
Figure 12-5.—Navy oxygen breathing apparatus (OBA).
