Establishments primarily engaged in manufacturing search, detection, navigation, guidance, aeronautical, and nautical systems and instruments. Important products of this industry are radar systems and equipment; sonar systems and equipment; navigation systems and equipment; countermeasures equipment; aircraft and missile control systems and equipment; flight and navigation sensors, transmitters, and displays; gyroscopes; airframe equipment instruments; and speed, pitch, and roll navigational instruments and systems. Establishments primarily engaged in manufacturing aircraft engine instruments or meteorological systems and equipment, including weather tracking equipment, are classified in Industry 3829.
| Acceleration indicators and systems components, aerospace types | Hydrophones |
| Air traffic control radar systems and equipment | Inertial navigation systems, aeronautical |
| Airborne integrated data systems/flight recorders | Infrared homing systems, aeronautical |
| Aircraft flight instruments | Instrument landing system instrumentation, airborne or airport |
| Airframe equipment instruments | Light reconnaissance and surveillance systems and equipment |
| Airspeed instrumentation (aeronautical instruments) | Machmeters |
| Altimeters, aeronautical | Missile guidance systems and equipment |
| Angle-of-attack instrumentation | Nautical instruments |
| Angle-of-yaw instrumentation | Navigational instruments |
| Artificial horizon instrumentation | Omnibearing instrumentation |
| Automatic pilots | Pictorial situation instrumentation |
| Bank and turn indicators and, components (aeronautical instruments) | Position indicators, airframe equipment: e.g., for landing gear, stabilizers |
| Cabin environment indicators, transmitters, and sensors | Radar systems and equipment |
| Compasses, gyroscopic and magnetic except portable | Radio magnetic instrumentation (RMI) |
| Distance measuring equipment (DME), aeronautical | Rate-of-climb instrumentation |
| Driftmeters, aeronautical | Sextants, except surveying |
| Fathometers | Sonabuoys |
| Glide slope instrumentation | Sonar fish finders |
| Gyrocompasses | Sonar systems and equipment |
| Gyrogimbals | Space vehicle guidance systems and equipment |
| Gyropilots | Taffrail logs |
| Gyroscopes | Warfare countermeasures equipment |
| Heads-up display (HUD) systems, aeronautical | Wheel position indicators and transmitters, aircraft |
| Horizon situation instrumentation | |
| Codes |
Titles | Total Marketable US Businesses |
| 38120000 | Search and navigation equipment | 1,657 |
| 38120100 | Aircraft/aerospace flight instruments and guidance systems | 344 |
| 38120101 | Acceleration indicators and systems components, aerospace | 101 |
| 38120102 | Aircraft flight instruments | 30 |
| 38120103 | Airspeed instrumentation (aeronautical instruments) | 5 |
| 38120104 | Altimeters, standard and sensitive | 4 |
| 38120107 | Artificial horizon instrumentation | 1 |
| 38120108 | Bank and turn indicators and components | 0 |
| 38120109 | Driftmeters, aeronautical | 1 |
| 38120110 | Electronic detection systems (aeronautical) | 15 |
| 38120111 | Flight recorders | 4 |
| 38120112 | Glide slope indicators | 0 |
| 38120113 | Gyro gimbals | 0 |
| 38120114 | Gyrocompasses | 0 |
| 38120115 | Gyropilots | 1 |
| 38120116 | Gyroscopes | 16 |
| 38120117 | Heads-up display systems (HUD), aeronautical | 5 |
| 38120118 | Horizon flight indicators | 1 |
| 38120119 | Inertial guidance systems | 10 |
| 38120120 | Infrared object detection equipment | 29 |
| 38120121 | Instrument landing systems (ILS), airborne or ground | 2 |
| 38120123 | Omnibearing indicators | 3 |
| 38120124 | Position indicators for aircraft equipment | 1 |
| 38120125 | Rate-of-climb instrumentation | 4 |
| 38120200 | Aircraft control instruments | 17 |
| 38120201 | Aircraft control systems, electronic | 58 |
| 38120202 | Automatic pilots, aircraft | 14 |
| 38120300 | Navigational systems and instruments | 127 |
| 38120301 | Antennas, radar or communications | 45 |
| 38120302 | Binnacles (compass housings) | 1 |
| 38120303 | Compasses and accessories | 10 |
| 38120304 | Control receivers | 1 |
| 38120305 | Degaussing equipment | 1 |
| 38120306 | Radar systems and equipment | 97 |
| 38120307 | Sonar systems and equipment | 107 |
| 38120308 | Space vehicle guidance systems and equipment | 12 |
| 38120400 | Nautical instruments | 15 |
| 38120401 | Fathometers | 0 |
| 38120402 | Hydrophones | 2 |
| 38120403 | Sextants | 20 |
| 38120404 | Taffrail logs | 0 |
| 38120500 | Defense systems and equipment | 1,072 |
| 38120501 | Missile guidance systems and equipment | 6 |
| 38120502 | Warfare counter-measure equipment | 9 |
| 38120600 | Search and detection systems and instruments | 71 |
| 38120601 | Air traffic control systems and equipment, electronic | 15 |
| 38120602 | Detection apparatus: electronic/magnetic field, light/heat | 50 |
| 38120603 | Electronic field detection apparatus (aeronautical) | 4 |
| 38120604 | Magnetic field detection apparatus | 11 |
| 38129901 | Cabin environment indicators | 7 |
| 38129902 | Distance measuring equipment | 6 |
| 38129903 | Light or heat emission operating apparatus | 13 |
| 38129904 | Pictorial deviation indicators | 1 |
| 38129905 | Radio magnetic instrumentation | 3 |
