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Gentex High
Altitude/Low Profile (HA/LP) Oxygen masks are designed for use
in both Pressure Breathing for G (PBG) equipped high performance
fighter/attack aircraft and Non-PBG equipped aircraft. HA/LP
Oxygen masks are used by the US and foreign military services
throughout the world.
The biggest
different between the MBU-20/P and the HA/LP consist in the
compatibility for Combat Edge equipped helmets. Instead of the
HA/LP the MBU-20/P provide a bladder supply hose that connects
the mask to an occipital bladder in the helmet to provide
automatic mask tensioning during high G maneuvers. The non-PBG
HA/LP Oxygen masks are direct replacements for both MBU-5/P and
MBU-12/P masks. The navy versions of this masks are the MBU-23
(HA/LP) and the MBU-24 (combat edge).
Similar to the
MBU-20/P the HA/LP masks provide a +600kt windblast protection.
Separate inhalation and exhalation valves minimizing the
breathing resistance. The mask utilize a lightweight hardshell
that may be custom fitted. The silicone rubber facepiece
incorporates a reflective seal design and a chincup which
provides injury protection following high speed or high altitude
ejection.
An optional
anti-suffocation valve can be incorporated in the HA/LP Oxygen
masks. Also a variety of microphones can be configured to the
HA/LP masks like the NATO compatible microphone, the modified
M-169/A/AIC and the Electret (USN compatible) microphone.
The silicone hose
can be replaced with a hose that incorporates a tap off for a
PBG helmet bladder supply hose. (Gentex mask conversion kit, P/N
G000-1044-01)
For better
fitting Gentex provide 4 sizes of the HA/LP mask. (small narrow,
medium narrow, medium wide, large wide). For the female aviator
there is a 5th size developed (extra small narrow). This size is
available on a limited basis.
The HALP Mask (Photo:Gentex)
Source: Gentex
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