APPENDIX X 

 AN NOMENCLATURE SYSTEM 



Part 1.— Equipment indicator letters. 



Installation 



A— Airborne 



B— Underwater mobile, 

 submarine. 



D— Pilotless carrier. 



F— Fixed. 



G— Ground, general 



ground use (includes two 

 or more ground installa- 

 tions). 



K— Amphibious. 



M— Ground, mobile (in- 

 stalled as operating 

 unit in a vehicle which 

 has no functions other 

 than transporting the 

 equipment). 



P— Pack or portable 

 (animal or man). 



S— Water surface craft. 



T— Ground, transport- 

 able 



U— General utility (includes 

 two or more general 

 installation classes, 

 airborne, shipboard, 

 and ground) 



Type of equipment 



A— Invisible light, heat 

 radiation. 



C— Carrier. 



D— Radiac 



E— Nupac (nuclear protec- 

 tion and control). 



F— Photographic 



G— Telegraph or teletype. 



I— Interphone and public 

 address. 



J— Electromechanical (not 

 otherwise covered). 



K— Telemetering . 



L— Countermeasure . 



M— Meteorological . 



N— Sound in air . 



P— Radar . 



Q— Sonar and underwater 

 sound. 



R— Radio. 



Purpose 



A— Auxiliary assemblies (not 

 complete operating sets) . 



B— Bombing. 



C— Communications (receiving and 

 transmitting) . 



D— Direction finder, reconnais- 

 sance and/or surveillance. 



E— Ejection and/or release. 



G— Fire control or search-light 

 directing. 



H— Recording and/or reproducing 

 (graphic meteorological and 

 sound.) 



K— Computing . 



M— Maintenance and test assem- 

 blies (including tools). 



N— Navigational aids (including 

 altimeters, beacons, com- 

 passes, racons, depth sounding, 

 approach, and landing). 



Q-Special or combination of pur- 

 poses. 



R— Receiving, passive detecting. 



S— Detecting and/or range and 

 bearing, search. 



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