Division AIS.TR.350 Terrain and obstacle data – General requirementsF1

The coverage areas for sets of terrain and obstacle data shall be specified as:

1. (a)

   Area 1: the entire territory of a State;

2. (b)

   Area 2: within the vicinity of an aerodrome, subdivided as follows:

   1. (1)

      Area 2a: a rectangular area around a runway which comprises the runway strip plus any clearway that exists;

   2. (2)

      Area 2b: an area extending from the ends of Area 2a in the direction of departure, with a length of 10 km and a splay of 15 % to each side;

   3. (3)

      Area 2c: an area extending outside Areas 2a and 2b at a distance of not more than 10 km from the boundary of Area 2a; and

   4. (4)

      Area 2d: an area outside Areas 2a, 2b and 2c up to a distance of 45 km from the aerodrome reference point, or to an existing terminal manoeuvring area (TMA) boundary, whichever is nearer;

3. (c)

   Area 3: the area bordering an aerodrome movement area which extends horizontally from the edge of a runway to 90 m from the runway centre line and 50 m from the edge of all other parts of the aerodrome movement area; and

4. (d)

   Area 4: the area extending 900 m prior to the runway threshold and 60 m to each side of the extended runway centre line in the direction of the approach on a precision approach runway, Category II or III.