New Legaspi Airport Draft FS - PPP Center

lights. A position, and sometime an elevation, depending on the NAVIAD,
shall be determined for the selected electronic NAVAIDs associated with the
airport. The horizontal and vertical plot point for electronic NAVAIDs are listed
in Plot Points of NAVAIDs Table (Annex E).
Plot points shall be collected for all required visual NAVAIDs; NAVAIDs and
their “plot points” are identified in Plot Points of NAVAIDs Table. Reminder:
Elevations are not required for visual NAVAIDs.
Glide Slope Abeam Point: The abeam point is a calculated location. It is
defined as the point on the runway centerline at which the physical location of
the pint on the runway centerline at which the physical location of the point
survey on the Glide Slope device lies perpendicular to the runway centerline.
The height of this point will be interpolated from the runway end, threshold,
and/or profile information as appropriate.
Runway Crown and Airport Elevation: The highest point on each runway and
the highest point of all the usable runway surfaces must be determined.
Obstructions/Obstacles:
the 3-dimensional position of objects limiting or
impending non-precision area navigation approach and departure must be
determined. Diagram of the areas of concern surrounding the runway and the
arbitrary heights of obstacles must be presented. The controlling
obstructions/obstacles must be surveyed to the absolute accuracy specified in
Precision Table (Annex F) and the relative accuracy specified in the Accuracy
Table (Annex G). All other objects/obstructions shall be surveyed.
4.12.3 Frangible Objects
All frangible objects are not covered under this program. Frangible objects
are objects designed to breakaway such as, runway marker signs, taxiway
signs, wind socks, anemometers, approach light systems, etc. Do not survey
frangible navigational aids (except those in Airfield Features), meteorological
apparatus, parked aircraft, and mobile or temporary objects (i.e. construction
equipment, dirt/debris piles, etc.).
4.12.4 Survey Accuracy and Precision
Accuracy: The accuracy requirements are expressed (root sum square of the
accumulated process errors), per component (latitude, longitude, and ellipsoid
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