3.4.6 Salt fog, The weapon systems shall show no degradation of
performance or evidence of corrosion which would prevent the weapon
system from performing its intended function when exposed to the effects
of a salt atmosphere as defined herein.
Atomization of approximately 3 quarts of salt solution
per 10 cubic feet of test chamber volume per 24 hours.
The weapon system shall be exposed to the salt fog
atmosphere for a period of 48 hours.
3.4.7 Dust. The weapon system shall operate while being subjected
to blowing dust with particle size of 0.0001 to 0.0100 mm at wind speeds
of 15 knots.
3.4.8 Shock. The weapon system shall withstand, without damage,
shock forces encountered during installation and service.
3.4.9 Sand. The weapon systems shall operate while being subjected
to blowing sand of particle size from 0.01 to 1.00 mm at a wind speed of
3.5 Interchangeability. Unless otherwise specified on the drawings
all parts of the same part number shall be interchangeable. Testing
shall be as specified in 18.104.22.168.
3.6 Electromagnetic interference characteristics. The weapon
system shall meet the applicable electromagnetic interference charac-
teristics requirements of MIL-STD-461 as specified in the contract (see
6.2). Testing shall be as specified in 4.4.
3.6.1 System and radar compatibility. The gun mount (turret) drive
electrical noise generated during traversing and stopping the gun mount
shall not produce a false radar "lock-on". (The ready-to-fire light
shall remain off.)
22.214.171.124 The gun mount (turret) drive electrical noise with the
mount traversing drive motors locked and the systems in radar mode, the
decibel (DB) difference while operating before ambient DB, and after
revolving hand controls with action switch depressed maximum right and
and maximum left position, shall not exceed 4 DB. Distribution box
switch shall be in "test" position. The electrical noise shall not
produce a false radar "lock-on".
3.7 Marking. The weapon system shall be marked in accordance with
MIL-W-13855. Each weapon shall be identified by a serial number assigned
by the procuring activity (see 6.2).