曝光台 注意防骗
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airport, another approach, etc.
26.7 Pilots must ensure that they have climbed to a
safe altitude prior to proceeding off the published
missed approach, especially in nonradar environments.
Abandoning the missed approach prior to
reaching the published altitude may not provide
adequate terrain clearance. Additional climb may be
required after reaching the holding pattern before
proceeding back to the IAF or to an alternate.
26.8 Missed approach obstacle clearance is predicated
on beginning the missed approach procedure at
the Missed Approach Point (MAP) from MDA or DA
and then climbing 200 feet/NM or greater. Initiating
a go−around after passing the published MAP may
result in total loss of obstacle clearance. To
compensate for the possibility of reduced obstacle
clearance during a go−around, a pilot should apply
procedures used in takeoff planning. Pilots should
refer to airport obstacle and departure data prior to
initiating an instrument approach procedure. Such
information may be found in the “TAKE−OFF
MINIMUMS AND (OBSTACLE) DEPARTURE
PROCEDURES” section of the U.S. TERMINAL
PROCEDURES publication.
27. Overhead Approach Maneuver
27.1 Pilots operating in accordance with an IFR
flight plan in Visual Meteorological Conditions
(VMC) may request ATC authorization for an
overhead maneuver. An overhead maneuver is not an
instrument approach procedure. Overhead maneuver
patterns are developed at airports where aircraft have
an operational need to conduct the maneuver. An
aircraft conducting an overhead maneuver is
considered to be VFR and the IFR flight plan is
cancelled when the aircraft reaches the initial point on
the initial approach portion of the maneuver. (See
FIG ENR 1.5−33.) The existence of a standard
overhead maneuver pattern does not eliminate the
possible requirement for an aircraft to conform to
conventional rectangular patterns if an overhead
maneuver cannot be approved. Aircraft operating to
an airport without a functioning control tower must
initiate cancellation of an IFR flight plan prior to
executing the overhead maneuver. Cancellation of
the IFR flight plan must be accomplished after
crossing the landing threshold on the initial portion of
the maneuver or after landing. Controllers may
authorize an overhead maneuver and issue the
following to arriving aircraft:
27.1.1 Pattern altitude and direction of traffic. This
information may be omitted if either is standard.
PHRASEOLOGY−
PATTERN ALTITUDE (altitude). RIGHT TURNS.
27.1.2 Request for a report on initial approach.
PHRASEOLOGY−
REPORT INITIAL.
1314 JFUELBY 0 088
AIP ENR 1.5−61
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
27.1.3 “Break” information and a request for the
pilot to report. The “Break Point” will be specified if
nonstandard. Pilots may be requested to report
“break” if required for traffic or other reasons.
PHRASEOLOGY−
BREAK AT (specified point).
REPORT BREAK.
28. Departure Procedures
28.1 Pre−Taxi Clearance Procedures
28.1.1 Locations where these procedures are in
effect are indicated in the Airport/Facility Directory.
28.1.2 Certain airports have established programs
whereby pilots of departing IFR aircraft may elect to
receive their IFR clearances before they start taxiing
for takeoff. The following provisions are included in
such procedures:
28.1.2.1 Pilot participation is not mandatory.
28.1.2.2 Participating pilots call clearance delivery/
ground control not more than 10 minutes before
proposed taxi time.
28.1.2.3 IFR clearance (or delay information, if
clearance cannot be obtained) is issued at the time of
this initial call−up.
28.1.2.4 When the IFR clearance is received on
clearance delivery frequency, pilots call ground
control when ready to taxi.
28.1.2.5 Normally, pilots need not inform ground
control that they have received IFR clearance on
clearance delivery frequency. Certain locations may,
however, require that the pilot inform ground control
of a portion of the routing or that the IFR clearance
has been received.
28.1.2.6 If a pilot cannot establish contact on
clearance delivery frequency or has not received an
IFR clearance before ready to taxi, the pilot should
contact ground control and inform the controller
accordingly.
29. Pre−departure Clearance Procedures
29.1 Many airports in the National Airspace System
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