Division NCO.OP.142 Destination alternate aerodrome – instrument approach operationsF1F2

The pilot-in-command of an aircraft must only select an aerodrome as a destination alternate aerodrome if either:

1. (a)

   an IAP that does not rely on GNSS is available either at the destination aerodrome or at a destination alternate aerodrome; or

2. (b)

   all of the following conditions are met:

   1. (1)

      the onboard GNSS equipment is SBAS capable;

   2. (2)

      the destination aerodrome, any destination alternate aerodrome, and the route between them are within SBAS service area;

   3. (3)

      ABAS is predicted to be available in the event of the unexpected unavailability of SBAS;

   4. (4)

      an IAP is selected (either at destination or destination alternate aerodrome) that does not rely on the availability of SBAS;

   5. (5)

      an appropriate contingency action allows the flight to be completed safely in the event of the unavailability of GNSS.