Table 4-3.—PRK-37/P Helmet Shell Sizing Guide
helmet assemblies is essential to ensure optimum
soiled or slightly scratched. clean the outside visor
performance during emergencies and routine
flights. The aircrew member is responsible for
cleaning and proper handling of the helmet. All
repairs and modifications are done by the PR at
the organizational maintenance level or above.
Cleaning
You must clean all parts of the helmet at least
every 90 days. To clean the shell and edge roll,
use mild detergent and water. Sometimes you may
have to use a mild abrasive scouring powder to
remove stains or scuff marks. The chin strap, nape
strap, and fitting pads may be cleaned by lightly
sponging with a solution of detergent and water.
The skull cap may be laundered in a machine, but
this is the responsibility y of the aircrew member.
The visor assemblies are probably the most
important parts that require cleaning. If you have
ever worn sunglasses and they became dirt y, you
know how aggravating that can become. By using
a solution of mild soap and water and a soft cloth,
you can clean most visor’s lenses. Rinse off the
solution and allow to dry. If lenses are still
only with liquid canopy polish. The inside of the
visor must be cleaned with a soft, lint-free cloth.
After cleaning, apply an antifog solution.
Addition of Reflective Tape
The addition of reflective tape on the helmet
provides for improved detectability of the downed
aircrew member. The tape must be affixed to all
helmets. However, in combat areas the tape may
be removed, as the crew commander directs.
White and red reflective tapes are recommended,
as they afford the greatest detectability y. When
applying the tape, you use any pattern specified
by the unit commander, as long as the tape pattern
covers a minimum of 100 percent of the helmet
visor housing and outer shell.
To apply the tape, you should preheat both
the helmet and the tape to approximately 100 “F.
This improves the adherence qualities and ease of
application.
Aviator helmets should be taped in accordance
with the provisions of chapter 7 of OPNAVINST
3710.7 (series) (general NATOPS) and any type
commander directives.
4-22
