MIL-DTL-16938D
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event
of a conflict between the text of this document and the references cited herein, the text of this
document takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection and testing in accordance with 4.2 and 6.4. Production shall not be started until the
contractor has furnished evidence that the sample has passed the first article tests.
3.2 General requirements.
3.2.1 Material. Material shall be as specified herein or shall meet the performance
requirements as specified herein.
3.2.2 Metals. Metals shall be nonmagnetic material and shall have a permeability of 2.0
or less after fabrication. All materials used shall be corrosion resistant.
3.2.3 Design. The signaling searchlight shall be designed in general conformance with
figures 1 and 2. It shall be a device which produces a relatively narrow beam of light for use as a
searchlight or for visual communication when the light beam is mechanically interrupted by
means of a shutter mechanism. The device shall be suitable for use as a portable searchlight or
for mounting on an adjustable mounting stand, and shall include suitable means for sighting and
hand training the light beam on the desired target. The searchlight shall consist of the following
assemblies:
a.
Filter and cover frame.
b.
Shutter.
c.
Backshell.
d.
Mounting.
e.
Lamp.
3.2.4 Construction. The searchlight shall be constructed for long service, without
frequent overhaul, under severe conditions of shock, vibration, temperature, humidity, and salt
atmosphere. The construction shall be simple and sturdy, and be such that the continued
operation and ordinary maintenance in service do not require special tools or excessively precise
workmanship. Special tools are defined as those tools not listed in the Federal Supply Catalog.
3.2.5 Painting of searchlight equipment. Prior to painting, all metal surfaces shall be
thoroughly cleaned in accordance with MIL-E-917 and given a corrosion-resistant treatment for
the application of the paint finish specified herein. Metal surfaces shall be given two coats of
zinc-chromate primer conforming to TT-P-645. The first priming coat shall be applied after all
machine work has been completed and after all surfaces to be covered have been thoroughly
cleaned and dried. The priming coats shall be followed by two coats of paint as specified in
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