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AIS.OR.355 Terrain data sets

SPECIFIC REQUIREMENTS FOR THE PROVIDERS OF AERONAUTICAL INFORMATION SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

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

GMGuidance material

GM1 AIS.OR.355Terrain data sets

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ADDITIONAL TERRAIN DATA Where additional terrain data is collected to meet other aeronautical requirements, the terrain data sets may be expanded to include this additional data.

GM · GM1 AIS.OR.355 — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 AIS.OR.355(b)(3)Terrain data sets

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TAKE-OFF FLIGHT PATH AREA ‘Take-off flight path area’ is defined in 3.8.2 of ICAO Annex 4.

GM · GM1 AIS.OR.355(b)(3) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 AIS.OR.355(b)(4)Terrain data sets

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AERODROME OBSTACLE LIMITATION SURFACES ‘Aerodrome obstacle limitation surfaces’ are defined in Chapter H – Obstacle Limitation Surfaces of Regulation (EU) No 139/2014.

GM · GM1 AIS.OR.355(b)(4) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

All rules in SUBPART A – ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF AERONAUTICAL INFORMATION SERVICES (AIS.OR)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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