Aircraft Operations

I-6-2-2
Procedures — Aircraft Operations — Volume I
Table I-6-2-1.
Obstacle clearance increment
Minimum obstacle
clearance over low flat
Distance beyond the boundary
terrain
of the holding area Metres Feet
1.0 to 1.9 km (0 to 1.0 NM)
1.9 to 3.7 km (1.0 to 2.0 NM)
3.7 to 5.6 km (2.0 to 3.0 NM)
5.6 to 7.4 km (3.0 to 4.0 NM)
7.4 to 9.3 km (4.0 to 5.0 NM)
Category H
300
150
120
90
60
0 to 3.7 km (0 to 2.0 NM) Linear
300 to 0
984
492
394
295
197
Linear
984 to 0
Feet
Metres
Holding level over high terrain or mountainous areas (see 2.3.2)
2 000
Holding pattern
600
Buffer
area
Holding area
Buffer
area
Lowest holding level (see 2.3.1)
1 000 300
Holding pattern
500 150
0
VOR
Obstacle clearance surface
0
9.3 km
(5.0 NM)
9.3 km
(5.0 NM)
Figure I-6-2-1. Minimum holding level as determined by the
obstacle clearance surface related to the holding area and the buffer area
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23/11/06