- Aircraft/aerospace flight instruments and guidance systems (22)
- Acceleration indicators and systems components, aerospace (12)
- Aircraft flight instruments (6)
- Altimeters, standard and sensitive (1)
- Artificial horizon instrumentation (1)
- Bank and turn indicators and components (1)
- Electronic detection systems (aeronautical) (1)
- Flight recorders (2)
- Infrared object detection equipment (6)
- Instrument landing systems (ILS), airborne or ground (2)
- Rate-of-climb instrumentation (1)
- Aircraft control instruments (3)
- Aircraft control systems, electronic (7)
- Automatic pilots, aircraft (2)
- Navigational systems and instruments (16)
- Compasses and accessories (1)
- Radar systems and equipment (23)
- Sonar systems and equipment (15)
- Space vehicle guidance systems and equipment (1)
- Nautical instruments (1)
- Defense systems and equipment (12)
- Warfare counter-measure equipment (4)
- Search and detection systems and instruments (5)
- Air traffic control systems and equipment, electronic (1)
- Detection apparatus: electronic/magnetic field, light/heat (9)
- Distance measuring equipment (1)
- Light or heat emission operating apparatus (1)
