The OPNAVINST 5510.1 is the Navy security manual. What you need to
know about protecting sensitive information is in this instruction. It
establishes security measures for handling and marking, as well as protection
and safeguards in transmitting and storing classified information.
Standardized fleet-wide procedures ensure optimum continued and consistent
protection of information vital to national security.
The following table contains a list of the most important chapters that you, as
a DM, must know:
Declassification, Downgrading, and Upgrading
Accounting and Controls
Printing, Reproduction, and Photographing
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