Guidance concerning Air Navigation in and above the NAT MNPSA
The time period between one set of OTS expiring and another set commencing is known as the transition period. The following procedures are in place to accommodate the majority of aircraft:
All times relate to 30W.
OTS Transition rules apply between 0801 to 1129UTC and 1901 to 0059UTC. During these times flight levels shall be applied in accordance with direction of flight other than as stated below.
Westbound traffic crossing 30W, 2230 to 0059UTC, shall remain clear of the incoming OTS and shall not use delegated ODLs (FL360 and FL380). After 2230, the OTS and ODLs (F360 and F380) are released to
NAT Doc 007