Figure 4-15.-HGU-33/P helmet assembly.
configuration to meet requirements for all fixed-
The helmet assemblies in current use are
designated as the HGU series. These lightweight
helmet assemblies are designed to provide face,
eye, aural, and head protection when properly
assembled and fitted to the aircrew member. The
helmet assemblies also house the headset
communications. Some helmet configurations
offer specialized features such as VTAS (Visual
Target Acquisition System), laser protective
lenses, sonar operator binaural cables, and boom
microphones. This series of helmets is based on
one type of helmet shell, the PRK 37/P.
MAJOR HELMET ASSEMBLIES
By taking the basic shell assembly, PRK-37/P,
and adding different liners, visors, and com-
munication systems (fig. 4-1 5), you can make 15
different helmet configurations.
HGU-33/P HELMET ASSEMBLY. The
HGU-33/P is a single lens, form-fit helmet for
use in aircraft where an oxygen mask is used
HGU-34\P HELMET ASSEMBLY. The
HGU-34/P is a single lens, pad-fit helmet required