The validity period of a day-time organised track system in MNPS (Minimum Navigation Performance Specification) airspace is normally, at 30°W, between:
Domanda 10, Operational Procedures - ATPL - Airline Transport Pilot license
| 10H30 UTC to 18H00 UTC |
| 01H00 UTC to 08H00 UTC |
| 11H30 UTC to 19H00 UTC |
| 00H00 UTC to 08H00 UTC |
