In addition to your ship's regular oxygen supply, you will take
emergency oxygen rations along on combat missions. If practical you will
also have several extra masks on board. Know where they are stored.
(1) Both of the low pressure walk-around bottles should be kept as full
as possible-- you never know when you may need them. If full, the small
walk-around bottle is good for only a few minutes, the large for 30 to
45 minutes, depending on your activity.
(2) High pressure equipment.
a. A-2 bottle with bag-mask. (Fig. 7)
In some theaters each combat crewman is issued this equipment. The
high pressure bottle is fully charged to 1800 and will last
approximately 45 minutes to one hour. It is used with the continuous
flow mask.
[Illustration: Fig. 7 A-2 OXYGEN BOTTLE WITH BAG MASK]
b. Bail-out bottle. (Fig. 8)
This small high pressure cylinder is a "last resort" source of
emergency oxygen. It contains approximately 12 minutes supply. The
old style bottle (H-1) is equipped with a pipe stem which is held
between the teeth. A newer bail-out bottle (H-2) has a bayonet
connection so it can be used with an A-14 mask with bail-out adapter
(see fig. 8).
[Illustration: Fig. 8 BAIL OUT BOTTLES]