- Air traffic control systems and equipment, air base
- Airfield approach and landing aids
- Navigation equipment, submarine
- Operations support facilities and equipment, air base / airport
- Operations support facilities and equipment, fixed base
- Radars, ground-based, fixed
- Radars, ground-based, fixed, air traffic control
- Radars, ground-based, fixed, airfield
- Radars, ground-based, fixed, airfield surveillance
- Radars, ground-based, fixed, ATC airspace surveillance
- Radio navigation equipment accessories, airborne
- Target location and tracking