scope:

Scope.

This specification covers the requirements for the HGU-55/P flyer's helmet.

Classification.

The helmets are of the following types and sizes, as specified (see 6.2).

Types.

The types of the helmet assemblies are as follows:

I Standard Helmet Assembly (low speed with MBU-12/P trim, visor assy)

II Light Weight Helmet Assembly (low speed with MBU-12/P trim visor assy)

III Light Weight Helmet Assembly (high speed with MBU-20/P visor assy)

IV Light Weight Helmet Assembly (low speed with MBU-20/P visor assy)

intended Use:

This helmet assembly is intended to be worn by military members of the United States Air Force for use in high performance military aircraft.