Figure 1-25.--Full-facepiece and half-facepiece cartridge
respirators with prefilters.
Figure 1-27.--Supplied-air respirator hose-line mask.
a. Sandblasting and spray-painting hoods are a
type of supplied-air respirators. The hood
fits over the entire head and neck and air
flows into the hood continuously. This
provides a positive pressure inside the hood,
Air-supplied hoods provide eye protection
and do not require fit-testing.
b. Sandblasting hoods are usually made of
leather or heavy material to resist
Spray-painting hoods may be made of
d i s p o s a b l e , p a p e r- l i ke m a t e r i a l w i t h
replaceable, peel-off window covers. See
BATTERY REFRIGERATOR STORAGE
Electrical energy for U. S. Navy mines is supplied
Figure 1-26.--Dust respirator.
by dry-cell batteries, which comprise a variety of