Alternate Aerodrome
Alternate Aerodrome : An aerodrome to which an aircraft may proceed when it becomes either impossible or inadvisable to proceed to or land at the aerodrome of intended landing. Alternate aerodromes include the following: (a) Takeoff Alternate Aerodrome (b) En-Route Alternate Aerodrome; (c) Destination Alternate Aerodrome. Note: The aerodrome from which a flight departs may also be an en-route or destination alternate aerodrome for that flight