38120 - Search, Detection, Navigation, Guidance, Aeronautical & Nautical systems, Instruments & Equipment (Miscellaneous)
38121 - Aeronautical, Nautical & Navigational instruments
3812101 - - Flight & Navigation compasses (Magnetic & Gyroscopic: Sensors, Transmitters & Displays)
3812103 - - Flight & Navigation sensors, Transmitters & Displays: Radio navigation receivers & Displays (incl Omni, Radio magnetic, Glide slope/localizer, DME, etc.)
3812108 - - Flight & Navigation altimeters, except radio & Radar altimeters (Sensors, Transmitters & Displays)
3812110 - - Flight airspeed indicators, incl Machmeters & Air data computers (Sensors, Transmitters & Displays)
3812112 - - Flight acceleration indicators & Systems components (Sensors, Transmitters & Displays)
3812113 - - Flight rate-of-climb indicators (Sensors, Transmitters & Displays)
3812115 - - Flight angle-of-attack indicators (Sensors, Transmitters & Displays)
3812117 - - Flight bank-and-turn indicators (Sensors, Transmitters & Displays)
3812118 - - Artificial horizon flight instruments (Sensors, Transmitters & Displays)
3812120 - - Other Aerospace & Navigational instruments, except aircraft engine instruments (Sensors, Transmitters & Displays)
3812121 - - Aeronautical & Navigational vertical gyroscopes sold separately
3812123 - - Aeronautical & Navigational directional gyroscopes sold separately
3812125 - - Aeronautical & Navigational free gyroscopes sold separately, Torqued & Untorqued
3812126 - - Aeronautical & Navigational rate gyroscopes sold separately, Inertial grade
3812128 - - Aeronautical & Navigational rate gyroscopes sold separately, Noninertial grade
3812161 - - Airframe position indicators (Mechanical, as for Landing gear, Cowl flaps, Stabilizers, etc.)
3812163 - - Airframe hydraulic system instruments (both Electrical & Mechanical measuring means)
3812164 - - Airframe cabin environmental measuring & Control instruments (Air-conditioning & Heating, etc.)
3812177 - - Thermocouple & Thermocouple lead wire (Aircraft type only)
3812180 - - Other Aerospace flight instruments, except aircraft engine instruments
3812185 - - Nautical instruments (All types, incl Temperature, Speed, Pitch)
3812189 - - Parts & Components for Aeronautical, Nautical & Navigational instruments
38122 - Search, Detection, Navigation & Guidance systems
3812211 - - Light reconnaissance & Surveillance electronic systems & Equipment
3812213 - - IFF equipment
3812215 - - Search & Detection proximity fuses
3812217 - - Airborne & Missile/space search, Detection & Acquisition radar
3812219 - - Ship (Marine) search, Detection & Acquisition radar
3812221 - - Ground search, Detection & Acquisition radar
3812223 - - Airborne & Missile/space tracking radar systems & Equipment
3812225 - - Ship (Marine) tracking radar systems & Equipment
3812227 - - Ground tracking radar systems & Equipment
3812229 - - Airborne, Missile/space & Ship (Marine) instrumentation radar systems & Equipment
3812231 - - Ground instrumentation radar systems & Equipment
3812233 - - Electronic checkout, Monitoring, Evaluation & Electronic instrumentation radar support equipment
3812235 - - Sonar search, Detection, Tracking & Communication system & Equipment for Surface ship applications (Destroyers, Destroyer-escort etc.)
3812237 - - Sonar search, Detection, Tracking & Communication system & Equipment for Submarine applications
3812239 - - Sonar search, Detection, Tracking & Communication system & Equipment for Airborne applications
3812241 - - Electronic checkout, Monitoring, Evaluation & other Electronic support equipment for Sonar search, Detection, Tracking & Communication systems
3812243 - - Specialized command & Control search & Detection data processing in display equipment from complete systems
3812245 - - Search, Detection, Identification & Tracking systems & Equipment (General)
3812247 - - Electronic warfare jamming equipment, Communications & Radar
3812249 - - Electronic warfare underwater countermeasures equipment
3812251 - - Other Electronic warfare active countermeasures equipment, excl passive materials such as Chaff, etc.
3812253 - - Specialized electronic & Communication intelligence equipment
3812255 - - Missile borne & Space vehicle borne search, Detection, Navigation & Guidance equipment
3812257 - - Nonmissile & Space vehicle guidance equipment (Ground, Ship, Airborne guidance systems, etc.)
3812259 - - Electronic checkout, Launching & other Missile & Space vehicle support systems
3812261 - - Airborne radio navigation receivers & Displays (Omni, Radio magnetic, Glide slope/localizer, etc.)
3812263 - - Airborne integrated navigation data systems/flight recorders
3812265 - - Airborne navigation distance measuring equipment (Dme)
3812267 - - Airborne navigation flight directors/situation displays
3812269 - - Airborne navigation heads-up display (Hud) systems
3812271 - - Airborne inertial navigation systems
3812273 - - Airborne navigation proximity warning/collision avoidance equipment
3812275 - - Airborne navigation complete automatic pilots
3812277 - - Other Airborne navigational systems
3812278 - - Navigation directional finder kits for Aircraft, Ship & Ground, to be assembled by the purchaser
3812279 - - Surface (Ship & Ground) navigational systems
3812281 - - Underwater navigational systems
3812283 - - Electronic checkout, Monitoring, Evaluation & other Electronic support equipment for Aircraft, Ship & Ground navigation systems
3812XX0 - - Search, Detection, Navigation, Guidance, Aeronautical & Nautical systems, Instruments & Equipment (Miscellaneous)
3812XX2 - - Search, Detection, Navigation, Guidance, Aeronautical & Nautical systems, Instruments & Equipment (Miscellaneous : Speciality )