The Technical Manual Identification Numbering System (TMINS) is a method of classifying, indexing, and numbering Navy technical manuals. This system was developed to encourage standardization and modernization. The 13-character alphanumeric system is patterned after the 13-digit NSN and serves both as a technical manual identification number (TMIN) and as a number used to requisition technical manuals.

The 13 characters are the publication identifier, which is divided into two sections. These two sections are the hardware/subject identifier (which contains seven alphanumeric characters) and the technical manual identifier (which contains six alphanumeric characters). These two sections are further divided as shown in figure 2-3

Hardware/Subject Identifier

The hardware/subject identifier is divided into blocks 1 through 7, described as follows:

0 Block 1, cognizant command (COG COM): Indicates the system command that has control of the publication (NAVSEA, NAVAIR, NAVELEX, etc.).

0 Blocks 2 through 5, standard subject classification code (SSIC): Identify the general classification of the subject matter or the commodity.

0 Blocks 6 and 7, subject serial: Identify the subject. (Assigned by the cognizant command during the early stages of development or procurement.)

Figure 2-3.-Elements of a TMINS.

Technical Manual Identifier

The technical manual (TM) identifier is divided into blocks 8 through 13, described as follows:

0 Blocks 8 through 10, TM acronym: Identify the type of manual (MMI maintenance manual, intermediate level; MMM maintenance manual, organizational and intermediate level; etc.).

0 Blocks 11 and 12, TM serial number: Identify a specific manual or a separately bound part of the manual.

0 Block 13, TM issue: Identifies the basic TM or a change.

For further clarification on TM identifiers, see the example in i ure 2-3 This example shows that a particular manual is under the cognizance of NAVSEA (S), and is generally related to weapons (W), and is related to underwater mines in particular (550). The subject serial assigned by NAVSEA (AA) shows that it is a maintenance manual for use at the intermediate level (MMI), and that it is the second volume (02) of the basic issue (0). For additional information pertaining to TMINS, refer to Navy Standard Technical Manual Identification Numbering System, N0000-00-IDX-000/TMINS.