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reject the issuance of a SID by ATC. You must accept or
reject the clearance based on:
• The ability to comply with the required performance.
• Possession of at least the textual description of the
SID.
• Personal understanding of the SID in its entirety.
When you accept a clearance to depart using a SID or
radar vectors, ATC is responsible for traffic separation.
ATC is also responsible for obstacle clearance. When
departing with a SID, ATC expects you to fly the procedure as charted because the procedure design considers
obstacle clearance. It is also expected that you will remain
vigilant in scanning for traffic when departing in visual
conditions. Furthermore, it is your responsibility to notify
ATC if your clearance would endanger your safety or the
safety of others.
PROCEDURES NOT ASSIGNED BY ATC
Obstacle departure procedures are not assigned by ATC
unless absolutely necessary to achieve aircraft separation.
It is the pilot’s responsibility to determine if there is an
ODP published for that airport. If a Part 91 pilot is not
given a clearance containing an ODP, SID, or radar
vectors and an ODP exists, compliance with such a
procedure is the pilot’s choice. If he/she chooses not to
use the ODP, the pilot must be operating under visual
meteorological conditions (VMC), which permits the
avoidance of obstacles during the departure.
DEPARTURES FROM TOWER-CONTROLLED
AIRPORTS
Departing from a tower-controlled airport is relatively
simple in comparison to departing from an airport that
isn’t tower controlled. Normally you request your IFR
clearance through ground control or clearance delivery.
Communication frequencies for the various controllers
are listed on departure, approach, and airport charts as
well as the A/FD. At some airports, you may have the
option of receiving a pre-taxi clearance. This program
allows you to call ground control or clearance delivery
no more than ten minutes prior to beginning taxi operations and receive your IFR clearance. A pre-departure
clearance (PDC) program that allows pilots to receive a
clearance via data link from a dispatcher is available for
Part 121 and 135 operators. A clearance is given to the
Figure 2-26. Cautionary Statements.
dispatcher who in turn relays it to the crew, enabling the
crew to bypass communication with clearance delivery,
thus reducing frequency congestion. Once you have
received your clearance, it is your responsibility to comply with the instructions as given and notify ATC if you
are unable to comply with the clearance. If you do not
understand the clearance, or if you think that you have
missed a portion of the clearance, contact ATC immediately for clarification.
DEPARTURES FROM AIRPORTS WITHOUT
AN OPERATING CONTROL TOWER
There are hundreds of airports across the U.S. that
operate successfully everyday without the benefit of a
control tower. While a tower is certainly beneficial
when departing IFR, most other departures can be
made with few challenges. As usual, you must file your
flight plan at least 30 minutes in advance. During your
planning phase, investigate the departure airport’s
method for receiving an instrument clearance. You can
contact the Automated Flight Service Station (AFSS)
on the ground by telephone and they will request your
clearance from ATC. Typically, when a clearance is
given in this manner, the clearance includes a void time.
You must depart the airport before the clearance void
time; if you fail to depart, you must contact ATC by a
specified notification time, which is within 30 minutes
of the original void time. After the clearance void time,
your reserved space within the IFR system is released
for other traffic.
There are several other ways to receive a clearance at a
non-towered airport. If you can contact the AFSS or
ATC on the radio, you can request your departure
clearance. However, these frequencies are typically
congested and they may not be able to provide you
with a clearance via the radio. You also can use a
Remote Communications Outlet (RCO) to contact an
AFSS if one is located nearby. Some airports have
licensed UNICOM operators that can also contact ATC
on your behalf and in turn relay your clearance from
ATC. You are also allowed to depart the airport VFR if
conditions permit and contact the controlling authority
and request your clearance in the air. As technology
improves, new methods for delivery of clearances at
non-towered airports are being created.
GROUND COMMUNICATIONS OUTLETS
A new system, called a Ground Communication
　
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本文鏈接地址：Instrument Procedures Handbook (IPH)儀表程序手冊(cè)上(56)