- Aircraft/aerospace flight instruments and guidance systems (9)
- Acceleration indicators and systems components, aerospace (1)
- Aircraft flight instruments (1)
- Bank and turn indicators and components (1)
- Electronic detection systems (aeronautical) (1)
- Infrared object detection equipment (2)
- Rate-of-climb instrumentation (1)
- Aircraft control instruments (1)
- Aircraft control systems, electronic (3)
- Navigational systems and instruments (12)
- Antennas, radar or communications (2)
- Compasses and accessories (2)
- Radar systems and equipment (12)
- Sonar systems and equipment (21)
- Space vehicle guidance systems and equipment (1)
- Sextants (1)
- Defense systems and equipment (27)
- Missile guidance systems and equipment (1)
- Warfare counter-measure equipment (1)
- Search and detection systems and instruments (5)
- Air traffic control systems and equipment, electronic (1)
- Detection apparatus: electronic/magnetic field, light/heat (3)
- Magnetic field detection apparatus (1)
