Flight Planning Procedures

For flights operating predominately in an east–west direction:

  • south of 70°N, the planned tracks shall be defined by significant points formed by the intersection of half or whole degrees of latitude at each 10° of longitude (60°W, 50°W, 40°W). For flights operating north of 70°N, significant points are defined by the parallels of latitude expressed in degrees and minutes with longitudes at 20° intervals
  • For flights operating predominately in a north–south direction, the planned tracks shall be defined by significant points formed by the intersection of whole degrees of longitude with parallels of latitude spaced at 5° (65°N, 60°N, 55°N).

North Atlantic Reduced Vertical Separation Minimum


The following flight level allocation scheme (FLAS) should be used by operators for flight planning purposes:

FL430

May be flight planned for both eastbound and westbound non-RVSM certified aircraft
 - 24 hours a day

FL410   Eastbound level - 24 hours per day
FL400 Westbound flight level - except within eastbound OTS  
FL390   Eastbound flight level - except within westbound OTS
FL380* Westbound flight level - except within eastbound OTS  
FL370   Eastbound flight level - except within westbound OTS
FL360* Westbound flight level - except within eastbound OTS  
FL350*   Eastbound flight level - except within westbound OTS
FL340 Westbound flight level - except within eastbound OTS  
FL330*   Eastbound flight level - except within westbound OTS
FL320* Westbound flight level - except within eastbound OTS  
FL310*   Eastbound flight level - except within westbound OTS
FL300 Westbound flight level - 24 hours per day  

FL290 and below

Even levels westbound - 24 hours per day Odd levels eastbound - 24 hours per day

Notes:

  1. Flight Level*: Shanwick/Gander may exchange on a tactical basis during OTS periods.
  2. OTS Times: Eastbound – 0100z to 0800z, Westbound – 1130z to 1900z. Times are UTC at 30° West.
  3. For operations outside of OTS times and/or the OTS structure, flight plan levels in accordance with the above flight allocation scheme.