FAR-77 obstructions.
Aircraft-movement aprons.
Prominent airport buildings.
Selected roads and other traverse ways.
Cultural and natural features of landmark value.
Miscellaneous and special-request items.
AOC surveys also establish or verify geodetic control in the airport vicinity that is accurately connected
to the NSRS. This control and the NSRS connection ensure accurate relativity between the points on the
airport and other surveyed points in the NAS, including GPS navigational satellites. AOC data is used
to--
Develop instrument-approach and -departure procedures.
Determine the maximum takeoff weights.
Certify airports for certain types of operations.
Update official aeronautical publications.
Provide geodetic control for engineering projects related to runway/taxiway construction,
NAVAID positioning, obstruction clearing, and other airport improvements.
Assist in airport planning and land-use studies.
Support activities such as aircraft accident investigations and special-purpose projects.
PART A - FEDERAL AVIATION ADMINISTRATION AND
FEDERAL AVIATION REGULATION STANDARDS
6.1 Requirements. FAA Publication 405 (FAA 405) and FAR-77 outline the required standards for
AOC surveys. Various areas, surfaces, reference points, dimensions, and specification requirements are
used in airfield surveys.
a. Runways. All length and width measurements should be determined to the nearest foot. If the
runway threshold is displaced, give the distance from the beginning of the runway surface. Determine
the coordinates (latitude and longitude) of the runway threshold and stop end at the runway centerline.
Elevations at the runway threshold, the stop end, and the highest elevation (within the first 3,000 feet
EN0593
6-2
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