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Explanation of Changes

E of Chg


Aeronautical Information Manual

Explanation of Changes

Effective: September 13, 2018

a. 4

−1−9. Traffic Advisory Practices at Airports

Without Operating Control Towers

This change adds a recommended practice instructing
pilots to use the correct airport name as identified in
appropriate aeronautical publications.

b. 4

−1−15. Radar Traffic Information Service

This change modifies the AIM to mirror FAA Order
JO 7110.65, Air Traffic Control. The AIM will now
state that for an aircraft with Mode C that is
unverified, the controller will issue the aircraft’s
indicated altitude.

c. 5

−1−1. Preflight Preparation

This change clarifies that pilots operating under 14
CFR Part 135 without an FAA

−assigned three−letter

designator must prefix their aircraft designator with
the letter “T.” This change also adds references to
FAA Order JO 7110.65 and FAA JO Order 7110.10,
Flight Services.

d. 5

−2−3. Taxi Clearance

This change advises pilots at participating airports
that they should contact ATC on the frequency or
phone number published in the Chart Supplement
U.S. in order to obtain or cancel their Instrument
Flight Rules (IFR) clearance.

e. 5

−2−8. Instrument Departure Procedures


− Obstacle Departure Procedures (ODP) and

Standard Instrument Departures (SID)

This change revises guidance regarding close

−in obstacles

to reflect charting changes and the location of that
information. Information on Diverse Vector Areas (DVA)
is also revised for clarity.

f. 5

−3−1. ARTCC Communications

This change replaces outdated information about
Build 1 with current information regarding Initial
Services. It also removes inaccurate information

about Miami ARTCC. Tables listing Controller Pilot
Data Link Communications (CPDLC) messages for
the U.S. initial services are also included in this

Another change to this paragraph adds guidance
regarding using only satellite (Inmarsat and Iridium)
for CPDLC and Automatic Dependent Surveillance

Contract (ADS

−C) purposes. Further, it delineates

the proper ICAO Flight Plan Item 10 equipment code
to file for the capability.

g. 5

−4−1. Standard Terminal Arrival (STAR)


This change clarifies that once a Descend Via
clearance is issued, pilots are allowed to begin a
descent while still navigating inbound to a STAR.
The previous language was vague, referring simply to
pilots “on” STARs.

h. 7

−1−2. FAA Weather Services


−1−3. Use of Aviation Weather Products


−1−5. Preflight Briefing

This change updates information regarding contract
FAA weather services available via the Internet as a
primary source for obtaining preflight briefings and
filing flight plans. This change also reflects the
cancellation of the Direct Users Access Terminal
(DUATS II) contract held by Lockheed Martin and

i. 9

−1−4. General Description of Each Chart


This change updates FIG 9

−1−14, Chart Supplement

U.S. Geographic Areas.

j. Entire publication.

Editorial/format changes were made where neces-
sary. Revision bars were not used when changes are
insignificant in nature.