What is NPA in the CIBIL score

Guidelines on the clearance of runways with instrument flight operations

Federal Ministry of Transport, Building and Housing



Obstacle Clearance Guidelines
for runways with instrument flight operations

(As of November 2, 2001)





1.


1.1
The guidelines cover runways at airfields that are intended for instrument flight operations. As a rule, these airfields require a building protection area according to § 12 LuftVG. In addition, in order to protect the procedural areas from non-precision approach procedures (NPA), the air traffic control authority defines obstacle information areas (HIB) in accordance with Section 18 b LuftVG, if they are necessary. The regulations of Appendix 14, Volume 1 of the Agreement of the International Civil Aviation Organization (ICAO), hereinafter referred to as Appendix 14 for short, apply to the construction and operation of airfields.


1.2
If these guidelines speak of structures, they also refer to other obstacles within the meaning of Section 15 (1) sentence 1 LuftVG.


2.
Obstacle boundary areas


2.1
Strips and end safety surfaces


2.1.1
The strip evenly surrounds the runway and the assigned stop lanes in the form of a rectangle with a width of 300 m (150 m for code numbers 1 and 2 without precision approach procedures). It starts 60 m before the threshold and ends 60 m after the end of the runway (or stop lane, if available).


2.1.2
Runway end safety area
A runway end safety area (RESA: Runway End Safety Area) must be located at each end of the strip of the runway and be at least 90 m long. Appendix 14 recommends 240 m for code 3 or 4 or 120 m for code 1 or 2)


The width should correspond to that of the strip, but at least twice the runway width.


2.1.3
The edge zone evenly surrounds the strip and the RESA and forms a rectangle with the width of 600m and the length of the runway plus 2x900m. In the case of lanes that are only used for starting, the length of the rectangle is the same as the length of the runway plus 150m in front of and 900m behind the lane.


2.2
(If values ​​are given in brackets, they only apply to runways in accordance with ICAO Annex 14 Code 1.)


2.2.1
The take-off area begins at a distance of 60 m (30 m) behind the designated end of the runway or at the end of the open area, if there is one and its length exceeds 60 m (30 m). It has a length of 2500 m (1600 m). It rises with a slope of 1:25 (1:20) The base line is geodetically at the same height as the end of the runway or the end of the open area and runs horizontally and at right angles to the extended runway center line. The base width of the departure area is 80 m (60 m). The side borders have an opening ratio (divergence) to the extended runway center line of 10%.


2.2.2
Lateral transition areas
The lateral transition areas begin at a distance of 75 m from the runway center line. They climb at a slope of 1: 5 and end at a height of 100 m from their baselines. The baselines are the same height parallels to the runway axis that extend to the start of the departure area. Outside of this area, the lateral transition areas lean against the level side boundaries of the departure areas.


2.2.3
The horizontal surface is a horizontal plane at 45 m above the airfield height. It is bounded by two convex opposing semicircles with a radius of 3600 m and their connecting rods. The centers of the semicircles lie above the intersection of the extended runway center line with the outer boundary of the strip.


2.2.4
The upper transition surface connects with the horizontal surface with a slope of 1:20 and rises to a height of 100 m above the height of the airport reference point.


2.3
Runways with a basic length of more than 1,200 m
(Code number 3 or 4)


2.3.1
The departure area begins at a distance of 60 m behind the designated end of the runway or at the end of the open area, if there is one and its length exceeds 60 m. It has a length of 15,000 m and rises with an incline of 1:50. The baseline is geodetically at the same height as the end of the runway or the end of the open space and runs horizontally and at right angles to the extended runway center line. The base width of the departure area is 180 m. The side borders have an opening ratio (divergence) to the extended runway center line of 12.5% ​​and an end width of 1800 m.


2.3.2
Lateral transition areas
The lateral transition areas begin at a distance of 150 m from the runway center line. They climb at a slope of 1: 7 and end at a height of 100 m from their baselines. The baselines are the same height parallels to the runway axis that extend to the start of the departure area. Outside of this area, the lateral transition areas lean against the level side boundaries of the departure areas.


2.3.3
The horizontal area is a horizontal plane 45 m above the height of the airport reference point. It is bounded by two convex opposing semicircles with a radius of 3,600 m and their connecting rods. The centers of the semicircles lie above the intersection of the extended runway center line with the outer boundary of the strip.


2.3.4
The upper transition surface connects with the horizontal surface with a slope of 1:20 and rises to a height of 100 m above the height of the airport reference point.


2.4
Runways with a basic length of less than 1,200 m
(Code number 1 and 2)
Note: Values ​​in brackets only apply to precision railways operating level (BS) 1


2.4.1
The approach area has a length of 5000 m (15,000 m, including a horizontal area of ​​3,000 m), begins at a height of 150 m (300 m) above the height of the baseline and has a slope of 1:30 (1:40) . Your side boundaries converge with a ratio to the center line of 15%.
The base line of the approach area is geodetically at the same height as the landing threshold and runs horizontally and at right angles to the extended runway center line. The approach area ends at a distance of 60 m in front of the landing threshold with a base width of 150 m (300 m).


2.4.2
Lateral transition areas
The lateral transition areas adjoin the side boundaries of the strip or the approach areas. They rise at a slope of 1: 5 (1: 7) and end at a height of 100 m from their baselines. The baselines are the same height parallels to the runway axis that extend to the beginning of the approach areas. Outside of this area, the lateral transition areas lean against the side boundaries of the approach areas at the same height.


2.4.3
The horizontal area is a horizontal plane 45 m above the height of the airport. It is bounded by two convex opposing semicircles with a radius of 3,600 m (3,600 m) and their connecting rods. The centers of the semicircles lie above the intersection of the extended runway center line with the outer boundary of the strip.


2.4.4
The upper transition surface connects with the horizontal surface with a slope of 1:20 and rises to a height of 100 m above the airfield.


2.5
Runways with a basic length of 1,200 m and more
(Code number 3 and 4)


2.5.1
The approach area has a length of 15,000 m, begins at a height of 300 m above the height of the baseline and has an incline of 1:50. Your side boundaries converge with a ratio to the center line of 15%.
The base line of the approach area is geodetically at the same height as the landing threshold and runs horizontally and at right angles to the extended runway center line. The approach area ends at a distance of 60 m in front of the landing threshold with a base width of 300 m.


2 5.2 
Lateral transition areas
The lateral transition areas adjoin the side boundaries of the strip or the approach areas. They climb at a slope of 1: 7 and end at a height of 100 m from their baselines. The baselines are the same height parallels to the runway axis that extend to the beginning of the approach areas. Outside this area, the lateral transition areas lean against the side boundaries of the approach areas at the same height.


2.5.3
The horizontal area is a horizontal plane 45 m above the height of the airport reference point. It is bounded by two convex opposing semicircles with a radius of 3,600 m and their connecting rods. The centers of the semicircles lie above the intersection of the extended runway center line with the outer boundary of the strip.


2.5.4
The upper transition surface connects with the horizontal surface with a slope of 1:20 and rises to a height of 100 m above the height of the airport reference point.


3.
Requirements for freedom from obstacles
The requirements for freedom from obstacles relate to the intended type of use of a runway, i.e. take-off and / or landing. They are to be used appropriately. If these obstacle-free requirements are to be waived in individual cases, a statement from the Federal Ministry of Transport, Building and Housing must be obtained.


3.1
Stripes, end safety areas (RESA) and edge zone
No structures or depressions may be erected or tolerated within the boundaries of the strip and the RESA. The only exceptions are systems that are absolutely necessary for safe and orderly flight operations and that meet the conditions of ICAO Annex 14, Vol. 1, Chapter 3 Sections 3.3, 3.3.6 in terms of their nature.


Within the peripheral zone, the building restrictions due to air traffic control and lighting requirements must be observed, taking into account the approach and departure procedures to be taken into account according to the local conditions.


In the case of precision tracks, however, no protruding obstacles should be erected in the inner part of the edge zone, which extends 450m in front of the ends of the track and up to 225m to the side of the track axis.


3.2
Approach and departure areas as well as lateral transition areas
Buildings / objects should not penetrate the approach and / or departure areas as well as the lateral transition areas.
Existing obstacles that penetrate the mentioned areas are to be removed if possible.
Exceptions are buildings / objects that are shaded by existing, non-removable obstacles.


-
is to be used as a basis for the approval of the facility and the operation of an airfield, also with regard to existing structures,
-
is to be observed at already approved airfields, also when erecting new structures as well as when increasing or expanding existing structures.


3.3
Horizontal surface and upper transition surface
No structures or other elevations should protrude into the outer obstacle limitation area which, depending on the local conditions, could endanger the safe conduct of flight operations.


3.4
Further requirements for freedom from obstacles
The clearance profiles to be determined by the carriers as well as the protection zones of the navigation equipment according to § 18 a LuftVG must be observed.
In addition, obstacles towering outside the lane can impair the navigation systems. Therefore, the area up to approx. 225 m to the side of the runway center line should be kept free of protruding obstacles as far as possible.


3.5
Approach area OAS and obstacle-free zone OFZ
For precision approach runways, the approach area (OAS Obstacle Assessment Surfaces) according to ICAO PANS-OPS as well as the landing area (OFZ Obstacle Free Zones) according to ICAO Appendix 14, Vol. 1, must also be taken into account, which consist of the inner approach area, Put the go-around area and the inner transition area together. Their dimensioning is shown in the BMVBW guidelines for all-weather flight operations.


4.
Statement from the authority responsible for air traffic control
Before the decision according to No. 3, an expert opinion must be obtained from the authority responsible for air traffic control in accordance with Section 31 (3) LuftVG. This does not release you from examining further aspects that are essential for the decision.


If the requirements of the opinion are to be deviated from for special reasons, the Federal Ministry of Transport, Building and Housing must be reported.


5.
This guideline comes into force on November 29, 2001. The guidelines NfL I-267/71 of September 30, 1971 are repealed at this point in time.




Isometric representation of the obstacle limitation areas for the approach

Isometric illustration of the obstacle limitation areas for departure





6.


Attachments (unofficial directory)

Appendix 1: Isometric representation of the obstacle limitation areas for the approach

Annex 2: Isometric representation of the obstacle limitation areas for departure

Appendix 3: Overview of the dimensions to be observed for runways