PUBLICATION IDENTIFIER (PI)
(USED AS REQUIRED)
(UP TO 13)
Figure 3-2.TMINS example (NAVAIR).
part of the TMINS is called the publication identifier
(PI). It is the essential root of the number. The PI is
always used, and it always has exactly 13 characters.
The second part of the TMINS is called the suffix.
It is an added field of up to 17 characters (including the
slash). When used, it gives user-oriented information.
The suffix is always used for classified manuals and
separately bound unclassified portions of classified
technical manuals. The suffix for both classified and
unclassified TMINS may also supply the user with
equipment designation, nomenclature, or model
Publication Identifier (PI)
The publication identifier (PI) is made up of two
major components: the hardware/subject identifier and
the technical manual (TM) identifier. The first seven
characters of the PI make up the hardware/subject
identifier. These characters identify the specific
hardware (such as an aircraft) or subject (such as an
airborne weapons system) to which the technical
manual applies. Once assigned, the project serial
number (for example, SA-AN/APS-39A radar set) will
represent the item throughout its life cycle. The first
seven characters of the PI (fig. 3-2) are divided into
The first group, cognizant (COG), of the PI is a
single letter-that tells what command publishes
and updates the publication. For example, the
COG is A for NAVAIRSYSCOM.
The second group, standard subject
classification code (SSCC), is a four-digit
alphanumeric code that identifies the
commodity or subject matter; for example, in
figure 3-2, the 1 in 1F18 indicates aircraft or
aviation. The F18 stands for the F/A-18 aircraft.
The third group, subject serial number (SUBJ
SERIAL), is a two-digit code (either numbers,
letters, or both) that is assigned by the Naval Air
Technical Data and Engineering Service
Command (NATEC) for aeronautic manuals. It
differentiates between items assigned to a given
SSCC series or subseries. In figure 3-2, the
subject serial number AC stands for F/A-18
aircraft federal labs.
The remaining six characters of the PI are called the
technical manual (TM) identifier. The six characters
identify a particular TM are divided into three groups.
The first group (TM acronym) consists of three
letters or numbers that identify the type of
manual; to illustrate, in figure 3-2, the TM
acronym NFM identifies the manual as a
NATOPS flight manual supplement.
Numerically, they can identify the first three
digits of a particular Work Unit Code; as an
example, 520 is an autopilot. In some instances
of Work Unit Codes, such as support equipment
(SE), a combination of a letter and two numbers
is used for the TM acronym; for example, S14 is
an air compressor.
The second group of the TM identifier (TM
serial number) is made up of two numbers. It is