| Radio navigation aid | |
| GNSS | A worldwide position and time determination system that includes one or more satellite constellations, aircraft receivers and system integrity monitoring, augmented as necessary to support the required navigation performance for the intended operation. |
| Aeronautical ground lights | Ground lights and other light beacons designating geographical positions which are selected by the State as being significant |
| Marine lights | |
| Special navigation system | Stations associated with special navigation systems (DECCA, LORAN, etc.), |