- Aircraft/aerospace flight instruments and guidance systems (7)
- Acceleration indicators and systems components, aerospace (2)
- Aircraft flight instruments (5)
- Heads-up display systems (HUD), aeronautical (2)
- Infrared object detection equipment (2)
- Instrument landing systems (ILS), airborne or ground (1)
- Omnibearing indicators (1)
- Aircraft control instruments (1)
- Aircraft control systems, electronic (1)
- Navigational systems and instruments (4)
- Antennas, radar or communications (3)
- Compasses and accessories (4)
- Radar systems and equipment (2)
- Sonar systems and equipment (2)
- Nautical instruments (1)
- Defense systems and equipment (6)
- Search and detection systems and instruments (3)
- Detection apparatus: electronic/magnetic field, light/heat (2)
- Electronic field detection apparatus (aeronautical) (1)
- Magnetic field detection apparatus (1)
- Distance measuring equipment (1)
