Figure 3-6.-Route sheet.
STANDARD SUBJECT IDENTIFICATION
The 13 major subject groups are subdivided into
primary, secondary, and sometimes tertiary
For the purpose of identification and filing,
standard subject identification numbers classify Navy
Figure 3-8 is an example of an identifying symbol
correspondence and directives under 13 major series
assigned to an instruction issued by the Office of the
groups. These major series groups are further
Secretary of the Navy.
subdivided by use of the last three digits in the major
Consecutive numbers are assigned to instructions
having the same subject identification number to show