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STORAGE OF SENSITIVE
MATERIAL
Certain materials because of their sensitive
nature require controlled movement and storage
conditions. Materials in this category that are
most often encountered are discussed in the
following paragraphs.
Chronometers
Chronometers are controlled equipage that,
in end-use ships, are always turned over to the
using department(s). When temporary storage
ashore is required, such as during periods of either
extended ship repair or deperming or flashing
operations, chronometers will be turned in to the
nearest chronometer pool for safekeeping.
Classified Material
Classified material will be stored and handled
as per the supplement to the Department of the
Navy Information and Personnel Security Pro-
gram Regulation, OPNAVINST 5510.1.
Delicate Instruments
Delicate instruments that usually are expen-
sive and easily damaged require especially careful
handling and protective storage. Delicate in-
struments should be kept in a dry atmosphere,
away from magnetron tubes or other magnetic
devices. When possible, the storeroom tempera-
ture should be kept at 700°F or below.
Electron Tubes
Electron tubes are very easily broken and,
therefore, must be carefully handled and ade-
quately packaged when being stored or issued.
Electron tubes susceptible to damage from
moisture normally are packed in moistureproof
barriers, frequently with desiccant (a dehydrating
agent). Humidity indicator cards or plugs are pro-
vided for inspecting the effectiveness of the
desiccant. Such indicators turn from blue to pink
as moisture is absorbed. When the desiccant
becomes pink, the desiccant must be replaced. The
cartons, cushioning, and other protective pack-
ing or packaging in which the electron tubes were
received should not be removed in storage unless
it is absolutely necessary because of space limita-
tions. When an electron tube container must be
reduced in size, positive identity of the tube and
as much of the packaging as possible should be
retained. When space is not a factor, the original
pack and packaging of an electron tube should
be opened only if it is reasonably certain that the
packaged tube is not the one identified by the
stock number on the container. Electron tubes
that are broken (or otherwise damaged) will be
disposed of as per the Naval Ships’ Technical
Manual, chapter 9670.
RADIOACTIVE ELECTRON TUBES.—
Instructions for the storage and handling of
radioactive material, including radioactive elec-
tron tubes, are provided in the NAVSUP P-485.
MAGNETRONS.— Magnetrons are diode
vacuum tubes in which the flow of electrons is
controlled by an externally applied magnetic field.
Special precautions will be taken to prevent
magnetrons with permanently attached magnets
from damaging magnetically sensitive instru-
ments, such as compasses (electronic or mechan-
ical) and wristwatches. (Wristwatches should not
be worn when handling magnetrons.) Unshielded
magnetrons with permanently attached magnets
must be kept at least 50 feet away from aircraft
or other vehicles with electronic compasses
installed.
REPACKAGING.— Electron tubes unpacked
for any reason except space limitation or use
should be repacked in the original carton when
possible. The tubes should be repacked with the
same packaging and in the same position as that
in the original carton. When repacking mag-
netrons or other tubes with attached magnets,
there must beat least 4 inches between the center
of the magnetic field and the outside of the
container.
STORAGE OF HAZARDOUS
MATERIAL
Certain materials have inherent properties that
make them hazardous to personnel, the ship, or
both. Most of these materials can be stored safely
if the proper care is taken.
Oxidizing Material
Many shipboard fires with resultant fatalities
have been attributed to improper storage or han-
dling of oxidizing materials, particularly calcium
hypochlorite. Oxidizing materials listed in the
CHIL are identified by SMCC J. Nitric acid, a
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