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Explanation of Changes

E of Chg−1

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

(DP) − 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This change replaces outdated information about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

7−1−3. Use of Aviation Weather Products

7−1−5. 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.