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2.3 Components
The M-20 consists of four main assemblies: the cover, the base, the latch and the
breathing Assembly. In the description of these assemblies the component names
are in
UPPERCASE
letters.
2.3.1 COVER Assembly
The COVER has an integral yellow TAB which, when lifted, releases any
vacuum developed due to the change in atmospheric pressure from the
surface to underground. Two cover overcases are affixed to the cover to
provide protection from shock and vibration.
2.3.2 BASE Assembly
The clear BASE has integral belt loops and a base overcase that is affixed
to the bottom of the base to provide protection from shock and vibration.
2.3.3 LATCH Assembly
The stainless steel LATCH band and stainless steel S-HOOK attach to
opposite sides of the BASE and clamp the COVER to the BASE. The S-
HOOK attaches to the user side of the BASE.
The LATCH band is released by raising the yellow lever on the LATCH
band. After the lever is raised, the COVER can be separated from the
BASE. The BASE stays attached to the user
’s belt, and the COVER is
discarded. The yellow nylon NECK STRAP is exposed after the COVER is
removed.
The yellow lever holds a tamper ball that falls away when the lever is lifted.
