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MIL-F-85668(AS)
3.2.1.11 Ammunition remaining signal.  The ammunition remaining signal
shall permit a count of the ammunition remaining in the storage and handling
subsystem. The counting accuracy tolerance shall be    10 rounds until the last
round has passed the counting device, after which the accuracy requirement shall
not apply.
3.2.1.12 Ammunition totalizer. The ammunition totalizer shall indicate
the total number of rounds that have been cycled through the system. The
totalizer shall perform independently of the gun and shall count all rounds
cycled including dummy and misfired rounds.
3.2.2 Physical characteristics.
3.2.2.1 Weight.
The weight of the system shall be not greater than 350
pounds.
3.2.2.2 Ammunition storage capacity. The system, including the feed
chute, shall have an ammunition storage capacity of 750 -10 rounds.
3.2.3 Reliability.  The mature system shall have a reliability of 7500
mean rounds between failure (MRBF).  See 6.3.3.1 and 6.3.3.2.
3.2.4 Maintainability.
3.2.4.1 Access.  The design shall permit simple and rapid access to the
major components without their removal from the system.
3.2.4.2 Gun replacement. The turret design shall allow the 1197 gun to be
replaced by two persons in a maximum of 10 minutes.  The required support
equipment shall be available during gun replacement.
3.2.4.3  Turnaround time. A maximum of 15 minutes shall be required to
fully reload and arm the system. When possible, the system design shall allow
personnel under combat conditions to fully reload and arm the system without the
use of any tool. Quick disconnect fasteners and hand-operated latches shall be
used on access panels. Latches, pins, and any other type of fastener shall be
operable by personnel wearing cold weather clothing. If the use of a screw-
driver is required, the type of screw heads used shall be standardized.
3.2.4.4 Special tools.  The system and its components shall be designed
for assembly, disassembly, and installation using standard and commercial tools.
The use of special tools shall be kept to a minimum.
3.2.5 Environmental conditions.  The system shall be capable of meeting
the performance requirements of this specification when subjected to the natural
and induced environments specified in 3.2.5.1 through 3.2.5.7.
3.2.5.1  Altitude. The system shall be capable of meeting the performance
requirements of this specification during exposure to a maximum altitude of
20,000  feet.
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