TM 1-8415-216-12&P
o. Oxygen Mask Communications Adapter (Figure 1-16). The oxygen mask communica-
tions adapter provides an interface between the oxygen mask and the helmet commu-
nications system.
A switch on the adapter plug allows the operator/wearer to select
the helmet boom microphone or the mask microphone without having to disconnect
from the aircraft communications system.
Figure 1-16. Oxygen Mask Communications Adapter
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