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Annex 14 -Aerodromes Volume I1
7
150' sector (Alternative
positions on the periphery
and swinging the whole
sector % 1 5 O from that shown
may be used in satisfying
requirements)
Final approach and Obstacles limited
take-off area
w
-22
rl)
-0 m
C
Y) n
0
Obstacles limited
D = Helicopter largest over-all dimension
I Obstacle free 1
Section AA
Figure 4-3. Helideck obstacle limitation sectors
Single-main-rotor and side-by-side twin rotor helicopters
Chapter 4 Annex 14 -Aerodromes
Figure 4-4. Helideck obstacle limitation sectors
Tandem-main-rotor helicopters - Omnidirectional operations
*
150° sector (Alternative
positions on the periphery
and swinging the whole
sector + 15O from that shown
may be used in satisfying
requirements)
Final approach and
take-off area
-t?
a, -: -
nrr,
0
Obstacles limited
D = Helicopter largest over-all dimension
Obstacle free J
Section AA
Annex 14 - Aerodromes Volume I1
150° sector
Landing direction
-aE,
-a, Landing direction
-3 to 1.1 m
+-
nG7
0
Obstacle free
D = Helicopter largest over-all dimension
r"" ' " V Z
Section A-A
Figure 4-5. Helideck obstacle limitation sectors
Tandem-main-rotor helicopters - Bi-directional operations
Chapter 4 Annex 14 -Aerodromes
approach surface
. ...-
Safety
area area
,
Shaded area to have same
characteristics as safety area
6. Squared final approach and take-off area
(straight approach-departure)
h T
Final approach and
take-off area (FAT0
Take-off climb1
approach surface
Shaded area to have same
characteristics as safety area
A. Circular final approach and take-off area
(straight approach-departure)
Final approachltake-off area
Figure 4-6. Take-off climb/approach surface (non-instrument FATO)
19
m
.CIS,
-0 w
k
C
C
LL D Safety 'pm area -
C. Squared final approach and take-off area
(curved approach-departure) - Final width
Annex 14 -Aerodromes Volume II
PLAN
90 m 17 30 % - . --
Extended centre line - (U
m
1 800 rn u
(U
L
(U
w
3
0
f
Figure 4-7. Take-off climb surface for instrument FAT0
Chapter 4 Annex 14 - Aerodromes
.
PLAN
w
m
w
IU
L
-IU
1 800 rn 3
- - 0
Extended centre line
PROFILE - 3O approach Horizontal
-
3 000 rn 2 500 m -, 4 500 rn
- .
PROFILE - 6 O approach
Horizontal . .
Figure 4-8. Approach surface for precision approach FAT0
Annex 14 - Aerodromes Volume ZZ
PLAN
90 rn
16%
/ Extended centre line - -
-7
s ?
..
PROFILE
Figure 4-9. Approach surface for non-precision approach FAT0
Chapter 4 Annex I4 -Aerodromes
Conical surface
5% (1:ZO)
Transitional surface - Inner horizontal surface
14.3% (1 :7)
100 rn
Safety
area
315 rn-4
1 100 rn 4 000 rn
Non-precision approach (end profiles)
Transitional surface
Conical surface
5% (1:ZO)
Alternative when no inner horizontal surface is provided
Precision approach (end profiles)
Figure 4-10. Transitional, inner horizontal and
conical obstacle limitation surfaces
Annex 14 -Aerodromes Volume I1
Limited obstacle Obstacle-f ree sector Limited obstacle
--
Reference points
',
\
/'
/
--
PLAN VIEW
D = Helicopter largest over-all dimension
Section A-A
Figure 4-1 1. Midship non-purpose built heliport obstacle limitation surfaces
Chapter 4 Annex 14 - Aerodromes
maximum height 0.05 D
- 1.5 D -
Obstacle-free sector
D = Helicopter largest over-all dimension
Figure 4-12. Ships-side non-purpose built heliport
obstacle limitation surfaces
Annex I4 -Aerodromes Volume II
Table 4- 1. Dimensions and slopes of obstacle limitation surfaces
NON-INSTRUMENT AND NON-PRECISION FAT0
Surface and dimensions
Nan-ins&urnent (visual) FAT0 Non-precision
(instrument
Helicopter performance class approach)
1 2 3 FAT0
APPROACH SURFACE
Width of inner edge
Location of inner edge
Width of safety area
Boundary
Width of safety area
Boundary
First section
Divergence - day 10% 10% 10% 16%
- night 15% 15% 15%
Length - day 245 mu 245 mu 245 mu 2 500 rn
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