6. Description
The components of Operations Center,
Communications AN/MSC-31 (para 5) are
housed in Shelter, Electrical Equipment
S-183/MSC-31 (fig. 5). External connec-
tions to the shelter are made at either
the binding post signal entrance box or the
power and signal entrance box. Alternating
current (ac) power for the shelter must be
obtained from a nearby shelter or other
local source (para 17). Figures 6 and 7 are
interior views of the AN/MSC-31; the lo-
cations of interior components are shown
in figures 11 through 16. The major com-
ponents of' the AN/MSC-31 are described
in paragraph 7 and the shelter components
in paragraph 8.
MSC-31
a. Shelter, Electrical Equipment S-183/
ponent of the AN/MSC-31 in which all
other components (para 5) are installed.
All equipment racks and mountings, ac
power receptacles, and signal wiring re-
quired for mounting and operating the AN/
MSC-31 components are installed in the
shelter. S t o r a g e areas and installed
mounting fixtures are provided for run-
ning spares and accessory items. The
shelter can be transported by helicopter
or truck and is fully insulated, watertight,
and airtight. Two lighttight exhaust blower
vents, equipped with hinged covers and
rain shields (not shown), are on the outside
front wall. A two-section door at the rear
permits entrance to the shelter. The upper
section of the door is used while the AN/
MSC-31 is truck mounted and the tailgate
--
is up.
(1) Lighting. Eight fluorescent lights
and one drafting light are provided
for shelter lighting (fig. 16).
(2) Power and wiring. Watertight re-
ceptacles in the power and signal
entrance box ((3) below) are pro-
vided for connecting the shelter to
an ac power source. The ac power
is routed through circuit breaker
switches in the power distribution
