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disposition
of Confidential
material.
Measures are required, however, to protect it
from unauthorized disclosure by controlling
access and ensuring proper marking, storage,
transmission, and destruction.
Serial Numbers
T h e D e p a r t m e n t o f t h e N a v y
Correspondence Manual, S E C N A V I N ST
5216.5,
prescribes
that
classified
correspondence be serially numbered by the
originator for each calendar year. A serial
number is one of a consecutive group of
arabic numerals assigned to a specific piece of
correspondence for identification purposes. A
separate consecutive group of numbers is used
for each security classification, and this group
of numbers is totally separate and distinct
from the unclassified correspondence serial
file numbers. Serial numbers of Confidential
letters are preceded by the letter ~; those for
Secret, by ~; and for Top Secret, by ~.
CUSTODIAL PRECAUTIONS
Classified material is not removed from
the physical confines of a command without
the knowledge and approval of the CO or an
authorized representative.
When classified
material is removed, a complete list is
prepared, signed by the individual removing
the material, and appropriately filed until the
material is returned.
Care During Working Hours
Each person in the Navy must take every
precaution to prevent deliberate or casual
a c c e s s to
classified
information by
unauthorized persons.
The following are
precautions that must be followed:
l W h e n c l a s s i f i e d d o c u m e n t s a re
removed from stowage for working purposes,
they are to be kept under constant surveillance
or face down or covered when not in use. At
no time will classified material be left
unattended.
l Any items used to prepare classified
material must be destroyed or safeguarded
according to the classification of the material
they are used to produce. These items include
drafts,
carbon
sheets,
carbon
paper,
correctable film typewriter ribbons, fabric
typewriter ribbons only used once, plates,
stencils, stenographic notes, worksheets, and
similar items.
After the upper and lower
sections of a fabric typewriter ribbon have
been cycled through the typewriter at least
five times, the ribbon may be treated as
unclassified.
“ Classified material, upon receipt, is
opened by the addressee or by persons
specifically authorized by the addressee in
writing to open material of the grade or
classification involved.
l If, for any reason, a room must be
vacated during working hours, any classified
material therein must be stowed according to
stowage instructions for the classification
involved.
Care After Working Hours
A system of security checks at the close of
each working day must be instituted to make
sure that classified material held by a
command is properly protected. Custodians
of classified material must make an inspection
to ensure the following requirements have
been met:
l Burn bags are properly stowed or
destroyed.
. The contents of wastebaskets that
contain classified material are properly stowed
or destroyed.
l Classified shorthand notes, carbon
paper, typewriter ribbons, rough drafts, and
similar papers are properly stowed or
destroyed. As a matter of routine during the
day, such items must be placed in burn bags
as soon as they have served their purpose.
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