used to identify different volumes, parts, and changes to specific TMs. For NAVAIR TMs, these numbers range from 00 through 99. In the example shown in figure 3-2, the TM serial number is 50. This stands for a Pilots Pocket Checklist. The third group of the TM identifier is the TM issue and is either a number (0 to 9) or a single letter. The number 0 indicates the TM is a basic issue or revision. The letters A through Z (except I and 0) designate (in alphabetical sequence) permanent changes or rapid action changes (RACs). PI Suffix Composition The PI suffix has a variable composition, depending upon whether or not the TM has a security classification. For classified TMs, the PI suffix is always used, and the security classification indicator forms the first component of the suffix. The security classification indicator is always three characters (a letter enclosed in parentheses). The entire suffix can contain up to 17 characters, if required. In figure 3-2, you can see that the PI suffix is not required. Therefore, the TMINS number A1-F18AC-NFM-500 stands for the initial or revised edition of a Pilots Pocket Checklist supplement to the NATOPS manual of an F/A-18 aircraft. In-depth information can be found in the OPNAV N0000-00-IDX-000/TMINS publication. Q3. What are the two technical publication number- ing systems that are used within the Navy?. Q4.   What technical publication numbering system is patterned after the 13-digit national stock number? NAVAL AERONAUTIC PUBLICATIONS INDEX (NAPI) LEARNING OBJECTIVE: Identify the sections of and describe the purpose of the Naval Aeronautic Publications Index (NAPI). All aeronautic publications, changes, technical directives (TDs), Navy departmental directives, and forms under the cognizance of NAVAIRSYSCOM and distributed by Naval Air Technical Data and Engineering Service Command (NATEC) are catalogued in the Naval Aeronautic Publications Index (NAPI). Normally, the central technical publication library (CTPL) in the quality assurance division should maintain a complete NAPI. The NAPI consists of six sections to make identifying, locating, and ordering specific publications easier. The six sections of the NAPI are also critical in the management, audit, and verification of the CTPL. Each section contains its own introduction as to the purpose or function of the section and the specific instructions on how to use that particular index. The six sections that presently make up the NAPI are as follows: NAVSUP PUB 2002, Navy Stock List of Publications, Forms, and Directives NAVAIR Technical Manuals and Technical Directives Distribution Listing NAVAIR 00-500A, Equipment Applicability List NAVAIR 00-500C, Directives Application List NAVAIR 00-500SE, Support Equipment Cross-Reference NAVAIR 01-700, Airborne Weapons Stores Publication Index NAVSUP PUB 2002 Distributed three times a year, the Navy Stock List of Publications, Forms, and Directives, NAVSUP PUB 2002, is the primary index for requisitioning Navy publications, forms, technical directives, and departmental directives from the Defense Distribution Depot Susquehanna Pennsylvania (DDSP). The NAVSUP PUB 2002 is issued in compact disk read only memory (CD-ROM) format. Each new edition of NAVSUP PUB 2002 supersedes the previous edition. NAVAIR Technical Manuals and Technical Directives Distribution Listing The NAVAIR Technical Manuals and Technical Directives Distribution Listing lists all NAVAIR publications and technical directives that were distributed by the automatic distribution system during a specified time. This publication is also one of the primary tools that is used to conduct annual audits on the CTPL. This listing is issued quarterly. This publication has two sections. Section 1 lists NAVAIR technical manuals and section 2 lists NAVAIR technical directives. This publication identifies technical manual and technical directive number, type of issue, level of maintenance, title stock 3-6