IRImplementing rule
CS ADR-DSN.J.480Precision approach runways
(a)The following obstacle limitation surfaces should be established for a precision approach runway Category I:
(1)conical surface;
(2)inner horizontal surface;
(3)approach surface; and
(4)transitional surfaces.
(b)The following obstacle limitation surfaces should be established for a precision approach runway Category II or III:
(1)conical surface;
(2)inner horizontal surface;
(3)approach surface and inner approach surface;
(4)transitional surfaces and inner transitional surfaces; and
(5)balked landing surface.
(c)The heights and slopes of the surfaces should not be greater than, and their other dimensions not less than, those specified in Table J-1, except in the case of the horizontal section of the approach surface in paragraph (d) below.
(d)The approach surface should be horizontal beyond the point at which the 2.5 % slope intersects:
(1)a horizontal plane 150 m above the threshold elevation; or
(2)the horizontal plane passing through the top of any object that governs the obstacle clearance limit; whichever is the higher.
(e)Fixed objects should not be permitted above the inner approach surface, the inner transitional surface or the balked landing surface, except for frangible objects which because of their function should be located on the strip. Mobile objects should not be permitted above these surfaces during the use of the runway for landing.
(f)New objects or extensions of existing objects should not be permitted above an approach surface or a transitional surface except when the new object or extension would be shielded by an existing immovable object.
(g)New objects or extensions of existing objects should not be permitted above the conical surface and the inner horizontal surface except when an object would be shielded by an existing immovable object, or if after a safety assessment, it is determined that the object would not adversely affect the safety or significantly affect the regularity of operations of aeroplanes.
(h)Existing objects above an approach surface, a transitional surface, the conical surface and inner horizontal surface should, as far as practicable, be removed except when an object would be shielded by an existing immovable object, or if after a safety assessment, it is determined that the object would not adversely affect the safety or significantly affect the regularity of operations of aeroplanes.
| APPROACH RUNWAYS | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RUNWAY CLASSIFICATION | ||||||||||
| Surface and dimensionsa | Non-instrument Code number | Non-precision approach Code number | Precision approach category | |||||||
| I Code number | II or III Code number | |||||||||
| 1 | 2 | 3 | 4 | 1, 2 | 3 | 4 | 1, 2 | 3, 4 | 3, 4 | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
| CONICAL | ||||||||||
| Slope | 5 % | 5 % | 5 % | 5 % | 5 % | 5 % | 5 % | 5 % | 5 % | 5 % |
| Height | 35 m | 55 m | 75 m | 100 m | 60 m | 75 m | 100 m | 60 m | 100 m | 100 m |
| INNER HORIZONTAL | ||||||||||
| Height | 45 m | 45 m | 45 m | 45 m | 45 m | 45 m | 45 m | 45 m | 45 m | 45 m |
| Radius | 2 000 m | 2 500 m | 4 000 m | 4 000 m | 3 500 m | 4 000 m | 4 000 m | 3 500 m | 4 000 m | 4 000 m |
| INNER APPROACH | ||||||||||
| Width | - | - | - | - | - | - | - | 90 m | 120 me | 120 me |
| Distance from threshold | - | - | - | - | - | - | - | 60 m | 60 m | 60 m |
| Length | - | - | - | - | - | - | - | 900 m | 900 m | 900 m |
| Slope | - | - | - | - | - | - | - | 2.5 % | 2 % | 2 % |
| APPROACH | ||||||||||
| Length of inner edge | 60 m | 80 m | 150 m | 150 m | 140 m | 280 m | 280 m | 140 m | 280 m | 280 m |
| Distance from threshold | 30 m | 60 m | 60 m | 60 m | 60 m | 60 m | 60 m | 60 m | 60 m | 60 m |
| Divergence (each side | 10 % | 10 % | 10 % | 10 % | 15 % | 15 % | 15 % | 15 % | 15 % | 15 % |
| First section | ||||||||||
| Length | 1 600 m | 2 500 m | 3 000 m | 3 000 m | 2 500 m | 3 000 m | 3 000 m | 3 000 m | 3 000 m | 3 000 m |
| Slope | 5 % | 4 % | 3.33 % | 2.5 % | 3.33 % | 2 % | 2 % | 2.5 % | 2 % | 2 % |
| Second section | ||||||||||
| Length | - | - | - | - | - | 3 600 mb | 3 600 mb | 12 000 m | 3 600 mb | 3 600 mb |
| Slope | - | - | - | - | - | 2.5 % | 2.5 % | 3 % | 2.5 % | 2.5 % |
| Horizontal section | ||||||||||
| Length | - | - | - | - | - | 8 400 mb | 8 400 mb | - | 8 400 mb | 8 400 mb |
| Total length | - | - | - | - | - | 15 000 m | 15 000 m | 15 000 m | 15 000 m | 15 000 m |
| TRANSITIONAL | ||||||||||
| Slope | 20 % | 20 % | 14.3 % | 14.3 % | 20 % | 14.3 % | 14.3 % | 14.3 % | 14.3 % | 14.3 % |
| INNER TRANSITIONAL | ||||||||||
| Slope | - | - | - | - | - | - | - | 40 % | 33.3 % | 33.3 % |
| BALKED LANDING SURFACE | ||||||||||
| Length of inner edge | - | - | - | - | - | - | - | 90 m | 120 me | 120 me |
| Distance from threshold | - | - | - | - | - | - | - | c | 1 800 md | 1 800 md |
| Divergence (each side) | - | - | - | - | - | - | - | 10 % | 10 % | 10 % |
| Slope | - | - | - | - | - | - | - | 4 % | 3.33 % | 3.33 % |
| a. All dimensions are measured horizontally unless specified otherwise. b. Variable length (CS ADR-DSN.J.475(c) or CS ADR-DSN.J.480(d)). c. Distance to the end of strip. d. Or end of runway whichever is less. | e. Where the code letter is F (Code element 2 of Table A-1), the width is increased to 140 m. | |||||||||
Table J-1. Dimensions and slopes of obstacle limitation surfaces — Approach runways
[Issue: ADR-DSN/3]
[Issue: ADR-DSN/4]
IR · CS ADR-DSN.J.480 — Regulation (EU) No 139/2014 · ED Decision 2017/021/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026