- Aircraft/aerospace flight instruments and guidance systems (7)
- Acceleration indicators and systems components, aerospace (2)
- Aircraft flight instruments (1)
- Airspeed instrumentation (aeronautical instruments) (3)
- Electronic detection systems (aeronautical) (1)
- Gyroscopes (1)
- Inertial guidance systems (1)
- Aircraft control instruments (2)
- Aircraft control systems, electronic (1)
- Navigational systems and instruments (5)
- Antennas, radar or communications (3)
- Radar systems and equipment (3)
- Sonar systems and equipment (2)
- Sextants (1)
- Defense systems and equipment (6)
- Search and detection systems and instruments (1)
- Air traffic control systems and equipment, electronic (1)
- Detection apparatus: electronic/magnetic field, light/heat (5)
- Magnetic field detection apparatus (3)
- Pictorial deviation indicators (1)
