Table 3.6. Accident Potential Zones (APZ).
2,133.60 m APZ II starts at the end of the APZ I, and is centered
[7,000 ft] and measured on the extended runway centerline.
Modifications will be considered if:
- The runway is infrequently used.
- Prevailing wind conditions are such that a large
percentage (that is, over 80 percent) of the
operations are in one direction.
- Local accident history indicates consideration of
- Most aircraft do not overfly an APZ area as
defined here during normal flight operations
(modifications may be made to alter these zones
and adjust them to conform to the line of flight).
- Other unusual conditions exist.
Air Force, Navy and Marine Corps airfields.
1. Applicable to aviation facilities of the Military Departments in the United States, its Territories, trusts, and
possessions. For military facilities overseas, other than in locations designated, follow guidance of the
individual service component.
2. For guidance on land use within the APZ's, see land use compatibility guidelines in DoD Air Installations
Compatible Use Zone (AICUZ) guidelines (Attachment 4). For USAF, see AFI 32-7063 and AFH 32-7084..
3. Metric units apply to new airfield construction, and where practical, to modifications to existing airfields and
heliports, as discussed in Paragraph 1.4.4.
4. Airfield and heliport imaginary surfaces and safe wingtip clearance dimensions are shown as a direct
conversion from inch-pound to SI units.
Table 3.7. Airspace Imaginary Surfaces.
Class A Runway
VFR & IFR
[1 000 ft]