IRImplementing rule
AIS.OR.355Terrain data sets
An AIS provider shall ensure that terrain data, if available, is provided:
(a)for Area 1, as laid down in point AIS.TR.350; and
(b)for aerodromes to cover:
(1)Area 2a or parts thereof, as laid down in point AIS.TR.350(b)(1);
(2)Areas 2b, 2c and 2d or parts thereof, as laid down in points AIS.TR.350(b)(2), (3) and (4), for terrain:
(i)within 10 km from the aerodrome reference point (ARP); and
(ii)beyond 10 km from the ARP if the terrain penetrates the horizontal plane 120 m above the lowest runway elevation;
(3)the take-off flight path area or parts thereof;
(4)an area, or parts thereof, bounded by the lateral extent of the aerodrome obstacle limitation surfaces;
(5)Area 3 or parts thereof, as laid down in point AIS.TR.350(c), for terrain that extends 0.5 m above the horizontal plane, passing through the nearest point on the aerodrome movement area; and
(6)Area 4 or parts thereof, as laid down in point AIS.TR.350(d), for all runways where precision approach Category II or III operations have been established and where detailed terrain information is required by operators to enable them to assess the effect of terrain on decision height determination by use of radio altimeters.
IR · AIS.OR.355 — Regulation (EU) 2017/373 · Commission Implementing Regulation (EU) 2020/469 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025