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AN (Army / Navy) Equipment Indicators

These AN (Army/Navy) equipment indicators are built of the "AN" prefix, a slash, and then the three-letter descriptors.

Example: AN/MPN-14: Ground, mobile, radar, navigational aid (the kind I worked on in the U.S. Air Force).

     AN = Army/Navy
       M = Ground Mobile
       P = Radar
       N = Navigational Aid
    -14 = Number in the series
Refer to AN Component Designators for replacements to the AN indicator.


1st Letter
Designated Installation Classes
2nd Letter
Type Of Equipment
3rd Letter
A - Airborne (installed and operated in aircraft)A - Invisible light, heat radiationA - Auxiliary assemblies (not complete operating sets used with, or part of, two or more sets or sets series
B - Underwater mobile, submarineB - Pigeon. New use is COMSECB - Bombing
C - Air transportable (inactivated, do not use). New designation for cryptographicC - CarrierC - Communications (receiving and transmitting
D - Pilotless CarrierD - RadiacD - Direction finder, reconnaissance, and/or surveillance
 E - Nupac. New use is LaserE - Ejection and/or release
F - FixedF - Photographic. New use is fiber optics 
G - Ground, general ground use (include two or more ground-type installations)G - Telegraph or teletypeG - Fire-control or searchlight directing
  H - Recording and/or reproducing (graphic meteorological and sound
 I - Interphone and public address 
 J - Electromechanical or inertial wire covered 
K - AmphibiousK - TelemeteringK - Computing
 L - CountermeasuresL - Searchlight control (Inactivated, use G)
M - Ground, mobile (installed as operating unit in a vehicle which has no function other than transporting the equipment)M - MeteorologicalM - Maintenance and test assemblies (including tools)
 N - Sound in airN - Navigational aids (including altimeters, beacons, compasses, rapcons, depth sounding, approach and landing
P - Pack or portable (animal or man)P - RadarP - Reproducing (inactivated, do not use)
 Q - Sonar and underwater soundQ - Special, or combination of purposes
 R - RadioR - Receiving, passive detecting
S - Water surface craftS - Special types, magnetic, etc., or combinations of typesS - Detecting and/or range and bearing, search
T - Ground, transportableT - Telephone wireT - Transmitting
U - General utility (includes two or more general installation classes, airborne, shipboard, and ground)  
V - Ground, vehicular (installed in vehicle designed for functions other than carrying electronic equipment, etc., such as tanks)V - Visual and visible light 
W - Water surface and underwaterW - Armament (peculiar to armament, not otherwise covered)W - Automatic flight or remote control
 X - Facsimile or televisionX - Identification and recognition
 Y - Data processingY - Surveillance
Z - Piloted/pilotless aircraft (drone)Z= CommunicationsZ - Secure

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