Designation System CodesAN = Army/Navy

Installation Information FunctionFIRST LETTER SECOND LETTER THIRD LETTER

A:B:C:D:E:F:G:H:I:J:K:L:

M:N:O:P:Q:R:S:

U:T:

V:W:X:Y:Z:

Manned Aircraft Invisible Light, Heat Radiation Auxiliary Assembly

Submarine Comsec - NSA Reserved Bombing

NSA Reserved Carrier - Electronic or Signal CommunicationsPilotless UAV/Drone Ionizing Radiation Direction Finding/Recon

Lazer Ejection and/or ReleaseFiber Optics

General Ground Use Telegraph or Teletype

Ground Fixed

Fire Control or Searchlight Directing

Recording and/or Reproducing

Interphone and Public Address

Electromechanical

Amphibious Telemetering Computing

Countermeasures

Ground Mobile Meteorological Maintenance

Manned Aircraft

Human Portable

Sonar and Underwater Sound

Radio

Special or Combination

RadarSpecial or Combination

Receiving or Passive Detecting

Active Detecting, SearchSurface ShipGround Transportable

General Utility - Multi Use

Vehicle

Telephone Transmitting

Computing - Data Processing

Visual, Visible Light

Targeting Tracking, Fire Control

Water Miscellaneous Weapons Remote Control

Identification or RecognitionTelevision or Fax

NSA Reserved Communications-NSA Reserved Secure-NSA Reserved

The numbers following the three letters and dash (-)uniquely identifies the equipment. Variations of sameequipment and more may follow the numbers.

(V)# = Hardware ConfigurationP = Plugin or Component

C = Crytographic T = Training

DUOTECHSERVICES.COM

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Ref: en.Citezendium

AN/APG-66Example AN/ = Army/Navy Designation System

A = Manned Aircraft P = Radar G = Fire Control 66 = Model