Aircraft Compass Calibration Pad Design Criteria
Must be accessible, free of nearby traffic, and
have sufficient space for the largest aircraft
using the facility to be moved in headed toward
For maximum accuracy, earth's magnetic field in
the area should be uniform in both magnitude
and direction. Tolerances prescribed are
required to ensure a swing accuracy of 0.2
Maintain following minimum clearances from
center of pad:
To nearest portion of building
containing any magnetic material
such as steel and iron
To nearest edge of railroad tracks
To dc power line and/or equipment
To edge of aircraft and vehicle
To ac power line and/or equipment
To underground electric power line
To overhead steam lines
To underground metal conduits
To centerline of nearest primary
taxiway or towway
Portland cement concrete without reinforcement.
All construction materials shall be free of
ferrous and other magnetic substances.
Provide 50-foot wide shoulders with transverse
grade maximum 4.0% and minimum 2.0%. Pave the
inner 10-foot shoulders in same manner as first
10 feet of runway shoulders from runway edge.
See Figure 27.