Download - OBSTACLE RESTRICTION AND REMOVAL
OBSTACLE RESTRICTION AND REMOVAL
ICAO ANNEX-14 VOL-I
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AIM
To define the airspace around aerodromes to be maintained free of obstacles so as to permit safe aerodrome operations and to prevent the growth of obstacles around aerodromes
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SEQUENCE
DefinitionsAerodrome Reference CodePrecision Approach RunwayNon-Precision Approach RunwayApproach Surface Take-off Surface Balked Landing Surface Transition SurfaceObstruction Limitation Surfaces
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DEFINITIONS
Runway stripA defined area including the runway and stopway, if provided, intended:
a)to reduce the risk of damage to aircraft running off a runway; and
b)to protect aircraft flying over it during take-off or landing operations.
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DEFINITIONS
Runway end safety area (RESA)
An area symmetrical about the extended runway centre line and adjacent to the end of the strip primarily intended to reduce the risk of damage to an aeroplane undershooting or overrunning the runway
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DEFINITIONS
Obstacle free zone (OFZ)
The airspace above the inner approach surface, inner transitional surfaces, and balked landing surface and that portion of the strip bounded by these surfaces, which is not penetrated by any fixed obstacle other than a low-mass and frangibly mounted one required for air navigation purposes
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DEFINITIONS
Balked landing
A landing manoeuvre that is unexpectedly discontinued at any point below the obstacle clearance altitude/height (OCA/H).
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DEFINITIONS
Aeroplane reference field lengthThe minimum field length required for take-off
at maximum certificated take-off mass, sea level, standard atmospheric conditions, still air and zero runway slope, as shown in the appropriate aeroplane flight manual prescribed by the certificating authority or equivalent data from the aeroplane manufacturer. Field length means balanced field length for aeroplanes, if applicable, or take-off distance in other cases.
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AERODROME REFERENCE CODE9
CODE ELEMENT 1 CODE ELEMENT 2Code
No(1)
Aeroplane reference field length
(2)
Codeletter(3)
Wing span
(4)
Outer main gearwheel span
(5)
1 Less than 800 m A
Up to but notincluding 15 m
Up to but notincluding 4.5 m
B15 m up to but notincluding 24 m
4.5 m up to notincluding 6 m
2800 m up to but not including 1 200 m C
24 m up to but not Including 36 m
6 m up to notincluding 9 m
D36 m up to but notincluding 52 m
9 m up to notincluding 14 m
31 200 m up to but not including 1800 m
E52 m up to but notincluding 65 m
9 m up to notincluding 14 m
4 1 800 m and over F65 m up to but notIncluding 80 m
14 m up to notIncluding 16 m
OBSTACLE LIMITATION SURFACES
The OLS comprises the following– Transitional surface– Approach surface/ Take-off climb surface– Inner horizontal surface– Conical surface– Outer horizontal surface– Inner approach surface– Inner transitional surface– Balked landing surface;
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PRECISION APPROACH RUNWAY
Following OLS must be established– Outer horizontal surface– Conical surface– Inner horizontal surface– Approach surface– Inner approach surface– Transitional surface– Inner transitional surface– Baulked landing surface– Take-off climb surface
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NON PRECISION RUNWAY
The following OLS must be established for a non-instrument runway and a non-precision instrument runway– Conical surface– Inner horizontal surface– Approach surface– Transitional surface– Take-off climb surface
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APPROACH SURFACE13
APPROACH SURFACE 14
IIIIII 30
60m
450m
1480’
3000m/9840‘
300m
450m’
450m
196’
17
2250m
2250m
300m 900m 1980m
3000m 3600m 8400m
15000m
HEIGHT 60m/196’
HEIGHT 150m/492’
6600m/21653’
HEIGHT 150m/492’
APPROACH SURFACE18
INNER APPROACH SURFACE19
INNER APPROACH SURFACE20
INNER APPROACH SURFACE
TAKE OFF CLIMB SURFACE21
TAKE OFF CLIMB SURFACE22
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900m’
900m
300m’
15000m
BALKED LANDING SURFACE24
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BALKED LANDING SURFACE26
TRANSITION SURFACES
The inner transitional surface would be used as the controlling surface for navigational aids, aircraft and vehicle holding positions which have to be located near the runway.
The transitional surface would be used for building height control.
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TRANSITION SURFACES28
TRANSITION SURFACE29
INNER TRANSITION SURFACE30
OBSTACLE LIMITATION SURFACES31
OUTER HORIZONTAL
SURFACE
CONICAL SURFACE
INNER HORIZONTAL SURFACE
OBSTACLE LIMITATION SURFACES32
Note: Guidance on the need to provide an outer horizontal surface and its characteristics is contained in the Airport Services Manual (Doc 9137), Part 6.
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