Chapter 3
Table 3.7. Airspace Imaginary Surfaces.
Class A Runway
Class B
Requirement
Runway
Item
Item
Requirement
No.
Description
Legend
VFR
IFR
VFR & IFR
Remarks
C
0m
0m
0m
Same as the runway centerline
10
Elevation of
[0 ft]
[0 ft]
[0 ft]
elevation at the threshold.
Approach-
Departure
Surface at start
of sloped
portion
C
76.20 m
152.40 m
152.40 m
Above the established airfield
11
Elevation of
[250 ft]
[500 ft]
[500 ft]
elevation.
Approach-
Departure
Surface at end
of sloped
portion
12
Start of
D
NA
6,096.00
7,620.00 m
Measured from the end of the
horizontal
m
[25,000 ft]
primary surface. The end of
portion of
[20,000
the primary surface (start of the
Approach-
ft]
approach-departure surface) is
Departure
60.96 m [200 ft] from the end
Surface
of the runway.
7,620.00 m
Measured horizontally along
D
NA
9,144.00
13
Length of
[25,000 ft]
the ground.
m
horizontal
[30,000
portion of
ft]
Approach-
Departure
Surface
2,743.20 m
Centered along the runway
D
NA
2,133.60
14
Width of
[9,000 ft]
centerline extended.
m
Approach-
[7,000 ft]
Departure
Surface at start
of horizontal
portion
4,876.80 m
Centered along the runway
D
NA
4,876.80
15
Width of
[16,000 ft]
centerline extended.
m
Approach-
[16,000
Departure
ft]
Surface at end
of horizontal
portion
3-38
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