General Information


Explanation of Changes

Effective: January 30, 2020

  1. 1-1-9. Instrument Landing System (ILS)
    Simplified Directional Facility (SDF)The majority of Middle Markers (MM) have been decommissioned and are not operationally required. Outer Markers (OM), or a suitable substitute, are required to identify the final approach fix for non-precision approaches. This change identifies suitable substitution methods for an OM. In addition, this change notes the service volume of a localizer can be utilized beyond 18 NM with the approval of the Flight Inspection branch. FIG 1-1-7 has been amended to add comments that refer to the MM.
  2. 1-1-12. NAVAIDS with Voice
    4-2-14. Communications for VFR Flights

    7-1-10. Inflight Weather Broadcasts

    Appendix 3. Abbreviations/Acronyms
    This change deletes Hazardous Inflight Weather Advisory Service (HIWAS), as this continuous broadcast service is no longer provided by Flight Service. However, Flight Service is still responsible to advise pilots of hazardous weather that will impact operation.
  3. 2-1-6. Runway Status Light (RWSL) System
    3-1-2. General Dimensions of Airspace Segments

    3-2-2. Class A. Airspace

    3-2-3. Class B Airspace

    3-2-4. Class C Airspace

    3-2-6. Class E Airspace

    4-1-15. Radar Traffic Information Service

    4-5-1. Radar

    4-5-5. Airport Surface Detection Equipment (ASDE-X) Airport Surface Surveillance Capability (ASSC
    4-5-7. Automatic Dependent Surveillance- Broadcast (ADS-B) Services

    5-1-4. Flight Plan - VFR Flights

    5-1-8. Flight Plan (FAA Form 7233-1) - Domestic IFR Flights

    5-2-7. Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times

    5-2-8. Departure Control

    5-6-6. Civil Aircraft Operations
    Within U.S. Territorial Airspace
    5-6-7. Civil Aircraft Operations
    Transitting U.S. Territorial Airspace
    5-6-8. Foreign State Aircraft Operations

    10-2-1. Offshore Helicopter Operations
    This change updates references and procedures to include ADS-B, providing guidance for ADS-B operations in the National Airspace System.
  4. 3-2-3. Class B AirspaceThis change reflects the statutory authority of 14 CFR 61.325 allowing light-sport aircraft to operate within Class B airspace by sport pilot certificate holders.
  5. 4-1-20. Transponder OperationThis change clarifies that most existing operating procedures and phraseology for aircraft transponders also apply to ADS-B Out. This change also removes several obsolete terms, references, phraseology examples, and other minor editorial changes.
  6. 4-4-12. Speed AdjustmentsThis change clarifies what pilots should expect when vectored off or deviating off a procedure that includes published speeds, and corrects a typographical error. It also includes guidance on what pilots should expect when reaching the end of a STAR. The change clarifies the range of speeds that pilots are expected to maintain for published or verbally-assigned speeds.
  7. 4-5-6. Traffic Information Service (TIS)This change corrects grammar and uses examples that more accurately reflect the intent.
  8. 4-6-1. Applicability and RVSM Mandate (Date/Time and Area)
    4-6-3. Aircraft and Operator approval Policy/Procedures, RVSM Monitoring, and Databases for Aircraft and Operator Approval

    4-6-4. Flight Planning Into RVSM Airspace

    4-6-5. Pilot RVSM Operating Practices and Procedures

    4-6-10. Procedures for Accommodation of Non-RVSM Aircraft
    This update supports changes to 14 CFR Part 91, Appendix G and Advisory Circular 91-85, Authorization of Aircraft and Operators for Flight in RVSM Airspace.
  9. 5-1-3. Notice to Airman (NOTAM) SystemThis change provides NAS users of updates to the U.S. NOTAM System and governance, reflecting a more accurate view of NOTAM information. It also removes references to sections that are no longer published in the Notices to Airmen Publication.
  10. 5-1-11. Flights Outside the U.S. Territorial AirspaceThis change incorporates the present day Canadian AIM policy regarding Round-Robin flights into the AIM. NAVCANADA and Transport Canada regulations no longer allow Round-Robin flight plans to be filed with a stop in Canadian territory.
  11. 5-2-8. Departure ControlThis change clarifies what pilots should expect prior to takeoff when a departure procedure was included in the departure clearance, but an initial heading to fly is assigned.
  12. 5-2-9. Instrument Departure Procedures (DP) - Obstacle Departure Procedures (ODP), Standard Instrument Departures (SID), and Diverse Vector Areas (DVA)This change gives pilots, operators, performance engineers, etc., further information on the value, accuracy, and limitations of the low, close-in obstacles published in the Terminal Procedures Publication (TPP). Some operators/performance engineers interpreted the existing verbiage to mean that the information in the TPP was the only source of obstacle data deemed appropriate for departure performance planning. The intent of this additional note is to direct attention to sources other than the TPP, without being specific (at least in the AIM/AIP) as to what those other sources might be.
  13. 5-2-9. Instrument Departure Procedures (DP) - Obstacle Departure Procedures (ODP), Standard Instrument Departures (SID), and Diverse Vector Areas (DVA)
    5-4-1. Standard Terminal Arrival (STAR) Procedures

    5-5-6. Radar Vectors
    This change clarifies what pilots should expect when vectored or deviating off a procedure that includes published speeds.
  14. 5-3-1. ARTCC CommunicationsTo keep pace with technological advances, the Controller Pilot Data Link Communications (CPDLC) message sets will continually evolve. As needed, new messages will be added and existing messages will be rewritten or removed. This change adds one new message, removes two messages, and modifies two messages of the CPDLC message set.
  15. 5-4-5. Instrument approach Procedure (IAP) ChartsThis change removes any references to VOR/DME RNAV.
  16. 5-4-7. Instrument Approach ProceduresThis change provides pilots with additional options when it is necessary to conduct an instrument approach at an airspeed higher than the maximum airspeed of its certificated aircraft approach category. It explains the flexibility provided in 14 CFR and emphasizes the primary safety issue of staying within protected areas.
  17. 5-4-16. Simultaneous Close Parallel PRM Approaches and Simultaneous Offset Instrument Approaches (SOIA)This change removes the term PRM from the monitor controller references in the paragraph.
  18. 5-4-22. Use of Enhanced Flight Vision Systems (EFVS) on Instrument ApproachesThis change adds additional verbiage and updated figures to clarify the information regarding EFVS operations.
  19. 5-4-23. Visual Approach
    5-4-24. Charted Visual Flight Procedure (CVFP)
    This change encourages pilots to use other available navigational aids to assist in positive lateral and vertical alignment with the runway.
  20. 7-1-11. Flight Information Services (FIS)This change announces that, with the exception of TFRs, NOTAMs older than 30 days will not be provided via FIS-B.
  21. 7-1-21. PIREPs Related to Airframe IcingThis change harmonizes Icing definitions with Advisory Circular 91-74B, as recommended by NTSB Recommendation A-10-034.
  22. 7-1-24. Wind Shear PIREPsThis change adds content on Wind Shear Escape Pilot Reports. This change advises the pilot to inform ATC when they are conducting a wind shear escape, only after aircraft safety and control is assured. Additionally, this change informs the pilot that once a wind shear escape maneuver is initiated, ATC is not responsible for providing approved separation until the pilot advises that the escape maneuver is complete, and approved separation has been re-established.
  23. Entire publication.

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


Federal Aviation Administration (FAA)

The Federal Aviation Administration is responsible for ensuring the safe, efficient, and secure use of the Nation's airspace, by military as well as civil aviation, for promoting safety in air commerce, for encouraging and developing civil aeronautics, including new aviation technology, and for supporting the requirements of national defense.

The activities required to carry out these responsibilities include: safety regulations; airspace management and the establishment, operation, and maintenance of a civil-military common system of air traffic control (ATC) and navigation facilities; research and development in support of the fostering of a national system of airports, promulgation of standards and specifications for civil airports, and administration of Federal grants-in-aid for developing public airports; various joint and cooperative activities with the Department of Defense; and technical assistance (under State Department auspices) to other countries.


Aeronautical Information Manual (AIM) Basic Flight Information and ATC Procedures

This manual is designed to provide the aviation community with basic flight information and ATC procedures for use in the National Airspace System (NAS) of the United States. An international version called the Aeronautical Information Publication contains parallel information, as well as specific information on the international airports for use by the international community.

This manual contains the fundamentals required in order to fly in the United States NAS. It also contains items of interest to pilots concerning health and medical facts, factors affecting flight safety, a pilot/controller glossary of terms used in the ATC System, and information on safety, accident, and hazard reporting.

This manual is complemented by other operational publications which are available via separate subscriptions. These publications are:

Notices to Airmen publication ‐ A publication containing data essential to the safety of flight as well as supplemental data affecting the other operational publications listed here. Issued every four weeks, this publication is available in PDF and HTML format via the Air Traffic Publication website at: and through subscription from the General Publishing Office (GPO).

The Chart Supplement U.S., the Chart Supplement Alaska, and the Chart Supplement Pacific - These publications contain information on airports, communications, navigation aids, instrument landing systems, VOR receiver check points, preferred routes, Flight Service Station/Weather Service telephone numbers, Air Route Traffic Control Center (ARTCC) frequencies, part-time surface areas, and various other pertinent special notices essential to air navigation. These publications are available through a network of FAA approved print providers. A listing of products, dates of latest editions, and print providers is available on the Aeronautical Information Services (AIS) website at:

Publication Schedule

Basic or Change

Cutoff Date
for Completion

Effective Date
of Publication

Basic Manual



Change 1



Change 2



Change 3



Basic Manual




Flight Information Publication Policy

The following is in essence, the statement issued by the FAA Administrator and published in the December 10, 1964, issue of the Federal Register, concerning the FAA policy as pertaining to the type of information that will be published as NOTAMs and in the Aeronautical Information Manual.

  1. It is a pilot's inherent responsibility to be alert at all times for and in anticipation of all circumstances, situations, and conditions affecting the safe operation of the aircraft. For example, a pilot should expect to find air traffic at any time or place. At or near both civil and military airports and in the vicinity of known training areas, a pilot should expect concentrated air traffic and realize concentrations of air traffic are not limited to these places.

  2. It is the general practice of the agency to advertise by NOTAM or other flight information publications such information it may deem appropriate; information which the agency may from time to time make available to pilots is solely for the purpose of assisting them in executing their regulatory responsibilities. Such information serves the aviation community as a whole and not pilots individually.

  3. The fact that the agency under one particular situation or another may or may not furnish information does not serve as a precedent of the agency's responsibility to the aviation community; neither does it give assurance that other information of the same or similar nature will be advertised, nor, does it guarantee that any and all information known to the agency will be advertised.

  4. This publication, while not regulatory, provides information which reflects examples of operating techniques and procedures which may be requirements in other federal publications or regulations. It is made available solely to assist pilots in executing their responsibilities required by other publications.

Consistent with the foregoing, it is the policy of the Federal Aviation Administration to furnish information only when, in the opinion of the agency, a unique situation should be advertised and not to furnish routine information such as concentrations of air traffic, either civil or military. The Aeronautical Information Manual will not contain informative items concerning everyday circumstances that pilots should, either by good practices or regulation, expect to encounter or avoid.


Aeronautical Information Manual (AIM) Code of Federal Regulations and Advisory Circulars

Code of Federal Regulations ‐ The FAA publishes the Code of Federal Regulations (CFR) to make readily available to the aviation community the regulatory requirements placed upon them. These regulations are sold as individual parts by the Superintendent of Documents.

The more frequently amended parts are sold on subscription service with subscribers receiving changes automatically as issued. Less active parts are sold on a single-sale basis. Changes to single‐sale parts will be sold separately as issued. Information concerning these changes will be furnished by the FAA through its Status of Federal Aviation Regulations, AC 00-44.

Advisory Circulars ‐ The FAA issues Advisory Circulars (AC) to inform the aviation public in a systematic way of nonregulatory material. Unless incorporated into a regulation by reference, the contents of an advisory circular are not binding on the public. Advisory Circulars are issued in a numbered subject system corresponding to the subject areas of the Code of Federal Regulations (CFR) (Title 14, Chapter 1, FAA).

AC 00-2, Advisory Circular Checklist and Status of Other FAA Publications, contains advisory circulars that are for sale as well as those distributed free-of-charge by the FAA.


The above information relating to CFRs and ACs is extracted from AC 00-2. Many of the CFRs and ACs listed in AC 00-2 are cross-referenced in the AIM. These regulatory and nonregulatory references cover a wide range of subjects and are a source of detailed information of value to the aviation community. AC 00-2 is issued annually and can be obtained free-of-charge from:

U.S. Department of Transportation
Subsequent Distribution Office

Ardmore East Business Center

3341 Q 75th Avenue

Landover, MD 20785


AC 00-2 may also be found at: under Advisory Circulars.

External References ‐ All references to Advisory Circulars and other FAA publications in the Aeronautical Information Manual include the FAA Advisory Circular or Order identification numbers (when available). However, due to varied publication dates, the basic publication letter is not included.


FAA Order JO 7110.65X, Air Traffic Control, is referenced as FAA Order JO 7110.65.


Subscription Information

This and other selected Air Traffic publications are available online:

To Obtain Copies of this Publication

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Phone: 202-512-1800


This manual will be available on the FAA website by its effective date. All Government organizations are responsible for viewing, downloading, and subscribing to receive electronic mail notifications when changes occur to this manual.

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