will list ground-based equipment requirements. On procedures with both PBN elements and equipment
requirements, the PBN requirements box will be listed first. The publication of these notes will continue
incrementally until all charts have been amended to comply with the new standard.
4. Approach minimums are based on the local altimeter setting for that airport, unless annotated otherwise;
e.g., Oklahoma City/Will Rogers World approaches are based on having a Will Rogers World altimeter setting.
When a different altimeter source is required, or more than one source is authorized, it will be annotated on the
approach chart; e.g., use Sidney altimeter setting, if not received, use Scottsbluff altimeter setting. Approach
minimums may be raised when a nonlocal altimeter source is authorized. When more than one altimeter source
is authorized, and the minimre different, they will be shown by separate lines in the approach minima box or
a note; e.g., use Manhattan altimeter setting; when not available use Salinltimeter setting and increase all
MDAs 40 feet. When the altimeter must be obtained from a source other than air traffic a note will indicate the
source; e.g., Obtain local altimeter setting on CTAF. When the altimeter setting(s) on which the approach is based
is not available, the approach is not authorized. Baro-VNAV must be flown using the local altimeter setting only.
Where no local altimeter is available, the LNAV/VNAV line will still be published for use by WAAS receivers
with a note that Baro-VNAV is not authorized. When a local and at least one other altimeter setting source is
authorized and the local altimeter is not available Baro-VNAV is not authorized; however, the LNAV/VNAV
minima can still be used by WAAS receivers using the alternate altimeter setting source.
NOTE-
Barometric Vertical Navigation (baro-VNAV). An RNAV system function which uses barometric altitude information from
the aircraft"s altimeter to compute and present a vertical guidance path to the pilot. The specified vertical path is computed
as a geometric path, typically computed between two waypoints or an angle based computation from a single waypoint.
Further guidance may be found in Advisory Circular 90-105.

5. A pilot adhering to the altitudes, flight paths, and weather minimums depicted on the IAP chart or vectors
and altitudes issued by the radar controller, is assured of terrain and obstruction clearance and runway or airport
alignment during approach for landing.
6. IAPs are designed to provide an IFR descent from the en route environment to a point where a safe landing
can be made. They are prescribed and approved by appropriate civil or military authority to ensure a safe descent
during instrument flight conditions at a specific airport. It is important that pilots understand these procedures
and their use prior to attempting to fly instrument approaches.
7. TERPS criterire provided for the following types of instrument approach procedures:
(a) Precision Approach (PA). An instrument approach based on a navigation system that provides course
and glidepath deviation information meeting the precision standards of ICAO Annex 10. For example, PAR, ILS,
and GLS are precision approaches.
(b) Approach with Vertical Guidance (APV). An instrument approach based on a navigation system that
is not required to meet the precision approach standards of ICAO Annex 10 but provides course and glidepath
deviation information. For example, Baro-VNAV, LDA with glidepath, LNAV/VNAV and LPV are APV
approaches.
(c) Nonprecision Approach (NPA). An instrument approach based on a navigation system which
provides course deviation information, but no glidepath deviation information. For example, VOR, NDB and
LNAV. As noted in subparagraph k, Vertical Descent Angle (VDA) on Nonprecision Approaches, some approach
procedures may provide a Vertical Descent Angle as an aid in flying a stabilized approach, without requiring its
use in order to fly the procedure. This does not make the approach an APV procedure, since it must still be flown
to an MDA and has not been evaluated with a glidepath.
b. The method used to depict prescribed altitudes on instrument approach charts differs according to
techniques employed by different chart publishers. Prescribed altitudes may be depicted in four different
configurations: minimum, maximum, mandatory, and recommended. The U.S. Government distributes charts
produced by National Geospatial-Intelligence Agency (NGA) and FAA. Altitudes are depicted on these charts
in the profile view with underscore, overscore, both or none to identify them as minimum, maximum, mandatory
or recommended.

Arrival Procedures

5-4-7