| Aircraft type not (yet) assigned a designator | ZZZZ |
| Airship | SHIP |
| Balloon | BALL |
| Glider | GLID |
| Microlight aircraft | ULAC |
| Microlight autogyro | GYRO |
| Microlight helicopter | UHEL |
| Powered parachute/Paraplane | PARA |
| Sailplane | GLID |
| Ultralight aircraft | ULAC |
| Ultralight autogyro | GYRO |
| Ultralight helicopter | UHEL |
