HELMET FITTING AND OPERATION
In this procedure, you will ensure that the helmet is properly fitted to the
crewmember. You will also familiarize the crewmember with operation
procedures, including donning and doffing the helmet (Steps 1 and 8
respectively), adjusting the nape strap (Step 2), fastening and unfastening
the chinstrap (Steps 3 and 7 respectively), operating the visors (Step 4), and
operating the communications system (Step 5).
1. Have the crewmember don the helmet as follows:
CAUTION
Spread the helmet slightly – just enough to allow ease of
donning. Excessive spreading may damage the helmet.
a. Grip the retention
assembly below the
earcups as shown in
Figure 3, view A.
b. Spread the sides of the
helmet slightly and
position the front edge
firmly against the
forehead as shown in
Figure 3, view B.
c. Roll the helmet back and
down onto the head.
Press the helmet firmly
downward with both
hands to ensure that the
helmet is properly seated
on the head and the ears
are surrounded by the
earcups. (The earcups
can be rotated for
optimum fit.)
d. Check the distance
between the eyebrows
and the edge of the
helmet shell; it should be
approximately (but no
more than) 3/4” for
optimum field of view.
(Continued on next page)
3
Figure 3. Donning Helmet
A
B
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