- Aircraft/aerospace flight instruments and guidance systems (27)
- Acceleration indicators and systems components, aerospace (7)
- Aircraft flight instruments (7)
- Altimeters, standard and sensitive (1)
- Electronic detection systems (aeronautical) (2)
- Gyroscopes (1)
- Infrared object detection equipment (6)
- Omnibearing indicators (1)
- Aircraft control instruments (1)
- Aircraft control systems, electronic (9)
- Automatic pilots, aircraft (4)
- Navigational systems and instruments (4)
- Antennas, radar or communications (3)
- Compasses and accessories (3)
- Degaussing equipment (1)
- Radar systems and equipment (15)
- Sonar systems and equipment (10)
- Space vehicle guidance systems and equipment (2)
- Nautical instruments (7)
- Sextants (3)
- Defense systems and equipment (15)
- Warfare counter-measure equipment (2)
- Search and detection systems and instruments (4)
- Air traffic control systems and equipment, electronic (4)
- Detection apparatus: electronic/magnetic field, light/heat (11)
- Distance measuring equipment (2)
- Radio magnetic instrumentation (1)
