that person is employed by the U.S.
SPECAT (SPEcial CATegory): Message traffic
associated with a special project or subject, with
access and handling limited to only those
personnel designated in writing by the
LIMDIS (LIMited DIStribution): Distribution
within the receiving activity is limited only to
those personnel with specific access and need-
PERSONAL FOR: A classified or unclassified
message with distribution limited only to the
named recipient(s), normally commanding
officers or flag officers.
WNINTEL: This is a control marking that
denotes "Warning Notice-Sensitive Intelligence
Sources or Methods Involved." Classified
intelligence so marked must not be disseminated
in any manner outside of authorized channels
without the permission of the originator.
All classified information or information that
requires special handling must be clearly marked.
Normally, printed pages are marked at the top and
bottom with a stamp or large machine-printed letters.
Classified words, subjects, or titles are marked at the
end of the subject line in parentheses. Information
within each paragraph or section of a narrative is
identified with the security classification and special
handling marking at the beginning of each paragraph or
section. Figure 1-1 shows an example of these
OPNAVINST 5510.1 also discusses requirements
for granting a security clearance for access to classified
information. Access to classified information is
granted only on a "need-to-know" basis. You will only
be granted access to classified information that is
necessary to perform your assigned duties.
Within your command, the Security Officer
maintains a list of all permanent party and visitor
security clearances and levels of access. Classified
information may not be discussed with anyone whose
clearance and access level cannot be verified.
As we discuss communications systems in the next
section, you will see that most of the environmental
information is handled and stored on computers and
automated systems. The Department of the Navy has
instituted a special security program to protect
automated information systems. Your activity has an
Automatic Data Processing Security Officer (ADPSO)
who is responsible for the security of all personal
computers (PCs) and PC based data handling, data
processing, and communication systems. The ADPSO
is also responsible for the security of other ADP
systems, such as the Tactical Environmental Support
System (TESS). The ADPSO will provide special
security training for personnel that use automated
systems as well as control access to these systems.
THIS IS AN EXAMPLE OF A CONFIDENTIAL NOFORN SUBJECT (C-NF)
(a) This is an example of an unclassified reference used in a classified message or other correspondence
(b) This is an example of a confidential reference title (C)
1. (C) This is an example of a confidential paragraph within a narrative.
2. (U) The second paragraph in this example is unclassified. The (U) only precedes a paragraph of unclassified
information in a document containing classified information.
3. (S-NF) This is an example of a secret, no forn paragraph. The entire document must be classified equal to the
highest classification and strictest special handling markings of any material contained within the document.
S E C R E T - NOFORN
(SECURITY MARKINGS FOR ILLUSTRATIVE PURPOSES ONLY)
Figure 1-1.Example of security markings in a Naval message.