Chapter 4
Table 4.7. Rotary-Wing Imaginary Surface for VFR Approaches.
Helicopter
Runway
and
Landing
Item
Legend
Lane
No. Item Description
in Figures
Helipad
Remarks
Army does not
Air Force Air Force and
have VFR Rotary-
and Army Army VFR
Wing Runways or
VFR
Limited Use;
Landing Lanes.
Standard
Navy and
Marine
Corps
Standard
Helipad and
Hoverpoints
(see note 1)
above the estab-
lished airfield
elevation. It then
rises vertically to
an elevation of 45.7
m (150 ft) above
the estab-lished
airfield elevation.
See Figures 4.5 and
4.10 for shape of
transitional
surfaces.
15
Horizontal Surface
G
Not
Not
Not Required
Required
Required
NOTES:
1. Navy and Marine Corps do not have criteria for same direction ingress/egress.
2. Metric units apply to new airfield construction and where practical modification to existing airfields and heliports,
as discussed in paragraph 1.4.4.
3. The criteria in this manual are based on aircraft specific requirements and are not direct conversions from inch-
pound (English) dimensions. Inch-pound units are included only as a reference to the previous standard.
4. Airfield and heliport imaginary surfaces and safe wingtip clearance dimensions are shown as a direct conversion
from inch-pound to SI units.
4-29
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