Chapter 1. General
1-1-1
Purpose
This order lists the location identifiers authorized by the Federal Aviation Administration and
Transport Canada.
It lists United States
airspace fixes and procedure codes. The order also includes guidelines for
requesting identifiers and procedures for making assignments.
1-1-2 Distribution
This order is distributed to offices in Washington
and Regional Headquarters, ATO Service Area Offices and field offices, Flight
Inspection Field offices, FAA
Technical Center,
Technical Assistance Groups, and the
Aeronautical Center.
Copies are sent to selected external addresses.
1-1-3 Cancellation
Order JO 7350.8F dated January 15, 2009, is canceled.
1-1-4 Issuance
a. This order
is published as a complete new edition on alternate aeronautical chart dates;
i.e., every 112 days.
b. Important interim United
States identifier assignments,
corrections, or deletions are published in the National Flight Data
Digest for use between revisions of this order. Users should carry forward to
this publication any changes pertinent to their operation.
c. For each edition, requested changes should be submitted to System
Operations/System Operations Airspace and AIM Office/Aeronautical Information
Management on, or before, the "Cutoff Date for Submission to
Aeronautical Information Management" listed below:
Publications Timetable
Edition |
Cutoff Date for Submission to Aeronautical Information Management |
Effective Date
of
Publication |
7350.8F |
9/25/08 |
1/15/2009 |
7350.8G |
1/15/2009 |
5/7/2009 |
7350.8H |
5/7/2009 |
8/27/2009 |
7350.8J |
8/27/2009 |
12/17/2009 |
7350.8K |
12/17/2009 |
4/08/2010 |
Processing the data, preparing it for publication,
and the printing and distribution processes will make it unlikely that field
facilities will receive the printed edition before the effective date of the
publication. Facilities should expect to receive this publication after the
effective date.
1-1-5
Notation of Changes
Additions and corrections in this order are summarized in the
Appendix
AP-2.
1-1-6
Identifier Deletions
Deletions are listed in the Appendix AP-1.
Section 2 Location
Identifiers System Administration
1-2-1 Use of
Location Identifiers
a. A Location Identifier takes the place of the name and the location of an
airport, navigation aid, weather station, and manned air traffic control
facility in air traffic control, telecommunications, computer programming,
weather reports, and related services.
1-2-2 Assignment
Authorities
a. The Federal Aviation Administration assigns three-letter
identifiers (except those beginning with the letters N, W, Y, and Z), three
and four character identifiers, and five-letter name codes for the United States
and its jurisdictions.
b. The Department of Navy assigns three-letter
identifiers beginning with the letter N for the exclusive use of that
Department.
c. Transport Canada assigns two, three, and
four character identifiers, including three letter identifiers beginning with
letters Y and Z, for its areas of jurisdiction.
d. The Federal Communications Commission assigns
blocks of identifiers beginning with K and W for its area of responsibility.
The block beginning with letter Q is under international telecommunications
jurisdiction and is used by FAA Technical Operations to capture National
Airspace equipment not published in this order.
e. The National Weather Service assigns four-letter,
one-number identifiers for certain weather requirements.
f. The U.S. Air Force Weather Agency (AFWA), acting on behalf of all the
military services, assigns special use four letter “KQXX” identifiers for use
by deployed units supporting real world contingencies; deployed/in-garrison
unites providing support during exercises; and units that have requested, but
not yet received a permanent location identifier.
g.
The Air Traffic Safety
Oversight (AOV) is requesting issuance of reserved identifier assignments in
order to address future Control Tower Operator Program needs and respond to
current airmen certification requirements. Identifiers beginning with the
letters AV00 through AV99 are assigned to AVO.
1-2-3 Coordination
a. In the FAA.
1. The System Operations/System Operations Airspace
and AIM Office/Aeronautical Information Management/National Flight Data
Center (NFDC) is responsible for the coordination of requests for location
identifiers within each service area.
2. Any reapplication or change in usage of a location
identifier assignment must receive prior clearance from NFDC.
3. Occasions will arise where a sponsor or interested
group will seek the advice of regional/service area office or field personnel
concerning the assignment of a particular identifier or a change to a more
preferred identifier. In these situations, no commitment shall be made.
Inquiries of this nature shall be referred to NFDC for information and advice
concerning appropriate handling of such matters.
b. In the Department of Navy, Naval Telecommunications
System, ICO-5, is responsible for final coordination and assignment of
"N" identifiers.
c. Transport Canada,
Aeronautical Information Service, is responsible for final coordination and
assignment of Canadian
location identifiers.
1-2-4 Permanence.
a. Established three-letter identifiers are considered permanent and will
not be changed without strong and documented justification, primarily
concerning air safety. Other than three-letter identifiers may be changed
when the status of a landing facility changes, e.g. private-use to
public-use, etc.
b. Location identifiers are not interchangeable and
cannot be transferred from one location to another or from one airport to
another even within the same community.
c. The original identifier will remain in effect, in most instances, even
though it has been necessary to change the facility’s name.
1-2-5 Duplication
a. At the same location, the same identifier may be assigned to one
navigational aid (which must be located within the airport boundary), to the
airport, to a manned air traffic control facility, and to an aviation weather
station on the airport. With certain restrictions, variations of the airport
identifier may be assigned also to landing systems.
b. Some duplication of three-letter assignments has
been made between air navigation facilities in the contiguous United States,
which are not associated primarily with a landing area, and U.S. Department
of Defense overseas air bases. For example, the second ILS at an airport in
the U.S. and an air base
in Italy, or an air base
in Germany and an en route
VORTAC in the U.S.
c. The first and second letters or second and third letters or third and
first letters of a three-letter identifier may not be duplicated with less
than 200 nautical miles separation
1-2-6 Effective
Dates
Location identifiers are published in the next edition of the order,
following assignment. All segments of the aviation industry and many related
activities use these codes in their daily business. The effective date of the
assignment, therefore, is set by each user group according to their respective
requirements.
1-2-7 Assignment
System
a. Three-letter identifiers are assigned as radio call signs to aeronautical
navigation aids; to airports with a manned air traffic control facility or
navigational aid within airport boundary; to airports that receive scheduled
route air carrier or military airlift service, and to airports designated by
the U.S. Customs Service as Airports of Entry. Some of these identifiers are
assigned to certain aviation weather reporting stations.
NOTE- Aviation weather reporting stations in
Alaska will be identified by (WS) in
Sections F and G of this Order.
b. Navigation aid identifiers are assigned by the following standards:
1. Instrument Landing System (ILS) Localizers and
Associated DME's. The initial ILS localizer is usually assigned the same
identifier as the airport it serves. (This may be altered if the airport has
not yet been assigned a three-letter identifier, or if the airport identifier
begins with a "K," "N," or "W"). If additional
localizers are established, separate three-letter identifiers will be
assigned each facility. This shall apply whether an additional localizer is
to serve the opposite end of an ILS equipped runway or a parallel runway,
even though both systems operate on the same frequencies on a non-simultaneous
basis. To distinguish the ILS localizer from another VHF facility using the
same identifier, the keyed ILS identifier is proceeded by the letter
"I". When DME is installed as an integral component of an ILS, the
same identifier, preceded by the letter "I" will be assigned to
both the localizer and DME.
2. Interim Standard Microwave Landing System (ISMLS). The
same criteria shall be used to assign an identifier to an ISMLS as an ILS.
The identifier assigned, however, shall be preceded by the letter
"M". If an ILS and ISMLS are installed on the same runway end, one
basic identifier may be assigned preceded by an ''I'' for the ILS and an
"M" for the ISMLS.
3. Compass Locators. The general term "compass
locator" also covers NDB/OM, LMM, and LOM regardless of output power or
type. The term is applied only to a non-direction radio facility which is
located at the VHF middle or outer marker site (front course) of an ILS. It
is assigned a name-code and a two-letter identifier. The two-letter
identifier is derived in the following manner:
(a) The three-letter localizer
identifier is considered as a base.
(b) The first and second letters of the
three-letter localizer identifier are assigned to the outer marker compass
locator (LOM) and the second and third letters are assigned to the middle
marker compass locator (LMM).
EXAMPLE-
Raleigh-Durham
|
ILS
|
Localizer
|
I-RDU
|
|
LOM
|
|
RD
|
|
LMM
|
|
DD
|
4. Localizer Type Directional Aids (LDA). This equipment
is of comparable accuracy to an ILS localizer and may be used in conjunction
with a glide slope and/or markers. It usually does not meet ILS siting
standards and is not part of an ILS. It is, however, assigned a three-letter
identifier preceded by the letter "I"
5. Simplified Directional Facilities (SDF). This equipment
is a directional type aid that operates on localizer frequencies. It is
assigned a three-letter identifier and shall not be preceded by the letter
"I". It does not meet all localizer performance tolerances and does
not have markers.
6. Non-directional Radio beacon. Non-directional radio
beacons are assigned three-letter identifiers except when they are also the
outer compass locator (LOM) or middle compass locator (LMM) of an ILS, or
placed at a marker site of an ILS. See Compass Locators above. The same basic
three-letter identifier cannot be shared by a terminal NDB and an ILS at the
same location.
7. VOR, VORTAC, and TACAN Facilities. These facilities are
assigned three-letter identifiers. If two or more such facilities or an NDB
are established at a location, they will be assigned different identifiers.
The same basic three-letter identifier can be assigned to one of these
terminal facilities and to an ILS localizer at the same location.
8. Distance Measuring Equipment (DME). This equipment is
used in conjunction with several type navigation aids. It is assigned the
same identifier as its associated aid, whether a VOR/DME, NDB/DME, or
ILS/DME.
c. Most one-number, two-letter identifiers have been assigned to aviation
weather reporting and observation stations and special-use locations. Some of
these identifiers may be assigned to public-use landing facilities within the
United States
and its jurisdictions, which do not meet the requirements for identifiers in
the three-letter series. In this identifier series, the number is always in
the first position of the three-character combination.
d. Most one-letter, two-number identifiers are assigned to public-use landing
facilities within the United
States and its jurisdictions, which do not
meet the requirements for identifiers in the three-letter series. Some of
these identifiers are also assigned to aviation weather reporting stations.
1. One-letter, two-number identifiers are keyed by the
alphabetical letter. The letter may appear in the first, middle or last
position in the combination of three characters. When the letter signifies an
Air
Traffic Control
Center's area, the
assignment will not change if the Center's boundaries are realigned.
2. Identifiers in this series, which could conflict with
the "Victor","Jet" or colored airway numbers are not
assigned.
e. Two-letter, two-number identifiers are assigned to private-use landing
facilities in the United
States and its jurisdictions which do not
meet the requirements for three-character assignments. They are keyed by the
two-letter Post Office or supplemental abbreviation (listed below) of the
state with which they are associated. The two letter code appears in the
first two, middle, or last two positions of the four character code.
1. The following supplemental codes are used in this
identifier series:
AA
|
Alaska
|
AN
|
Arizona
|
CL
|
California
|
CN
|
California
|
FA
|
Florida
|
FD
|
Florida
|
GE
|
Georgia
|
IS
|
Illinois
|
LL
|
Illinois
|
IG
|
Indiana
|
II
|
Indiana
|
SN
|
Kansas
|
LS
|
Louisiana
|
MY
|
Minnesota
|
MU
|
Missouri
|
VE
|
Nevada
|
JY
|
New Jersey
|
NK
|
New York
|
NA
|
North Dakota
|
OA
|
Ohio
|
OI
|
Ohio
|
OL
|
Oklahoma
|
OG
|
Oregon
|
PN
|
Pennsylvania
|
PS
|
Pennsylvania
|
TA
|
Texas
|
TE
|
Texas
|
TS
|
Texas
|
XS
|
Texas
|
VG
|
Virginia
|
WN
|
Wisconsin
|
WS
|
Wisconsin
|
WT
|
Washington
|
f. A single five-letter pronounceable combination serves as the fix name,
assigned identifier and computer code. If a new fix is to be collocated with an
existing navigation aid, ILS marker, way point, or other type fix, the
original name or name-code applies to both.
g. Weather Offices and Stations, may be assigned in any of the series of
Location Identifiers, depending upon type or combination of Station.
Generally, a Weather Service Office at an Airport is given a three-letter
identifier. AMOS equipment may be polled with any combination of
three-character identifiers. Some type of Aviation Weather Reporting Stations
are listed with two-number, one-letter identifiers.
1-2-8 Canceled
Assignments
a. All users are requested to periodically review assignments in their
area of responsibility, and notify NFDC as soon as an identifier or name-code
may be canceled.
b. Canceled three-letter assignments are held in
abeyance for one year, usually, before becoming available for reassignment.
c. Canceled number-alpha and five-letter assignments are
held in abeyance an appropriate length of time depending upon circumstances of
cancellation, but not more than one year.
1-2-9 Corrections
a. Upon receipt of this order, users are requested to verify the
proper listing of identifiers in their area of responsibility. Omitted,
incorrect and obsolete assignments and tie-in facilities should be reported
immediately to the NFDC. If available, include the correct information. See
Paragraph 1-1-4. for appropriate action dates.
b. A page is included inside the front cover for this
purpose.
1-2-10 Tie-In
Facility
The "FAA TIE-IN FACILITY" is the telecommunications facility that
handles flight plan messages for the listed landing facility or navigational
aid. This also applies to Canadian facilities. Tie-in facility hours are
local times. The absence of a facility in this column indicates that the
location identifier is being reserved for the future commissioning of the
landing facility or navigational aid.
1-2-11 ARTCC
Control Area
The computer code for the U.S.
Air Route
Traffic Control
Center or identifier of
the Canadian ARTCC (see note below) of jurisdiction is shown beside the
tie-in facility identifier opposite each landing facility and navigational
aid listing. This information has been included to assist in routing IFR
Flight Planning messages directly to ARTCC computers. The absence of a
facility in this column indicates that the location identifier is being
reserved for the future commissioning of the landing facility or navigational
aid.
NOTE-
These may change for any landing facility or
navigational aid depending on letters of agreement, ARTCC boundary
realignment, hours of service, traffic flight levels or altitudes. Additions,
deletions or changes of such information must be provided to NFDC by the
appropriate Air Traffic facility.
1-2-12 Metropolitan
Area Identifiers
A number of three-letter identifiers have been assigned in the past to
designate a metropolitan area where a principal city is served by more than
one airport, however, no further assignment of metropolitan codes is
contemplated. Existing metropolitan codes are not exchangeable with airport
codes at the same location.
1-2-13 Records and
Reviews
a. Location Identifiers System records are retained for five years.
Research of assignments beyond that time may be done only from history copies
of the order.
b. Continuing reviews are conducted to update
assignments in the Location Identifiers System. Assignments of more than five
years are subject to over all reviews and meeting current standards.
1-2-14 Reserved
Identifiers
A number of identifiers have been reserved for the future commissioning of
navigational aids and airports. These locations and identifiers will be
listed without an associated tie-in facility or center code.
1-3-1 Requests
a. Make requests for all identifier assignments in writing at least
120 days in advance of the proposed commissioning or effective date directly
to NFDC. Include the following information:
1. For United
States airport:
(a) Name of the airport (must include
site number, if civil airport).
(b) Name of city and state where
located.
(c) Type of airport (whether public,
private, or military).
(d) Coordinates of airport location;
i.e., latitude and longitude in degrees and minutes only.
(e) Center identifier of the ARTCC, if
known, which has jurisdiction over area within which the airport is located.
(f) Name or identifier of the FAA
tie-in facility for the airport.
(g) Name of scheduled air carriers (or MAC)
serving the airport, if any.
(h) Associated NAVAID's and their
assigned identifiers, if any.
(i) Type of weather reports which will
originate at the airport, if any.
2. For navigational aids:
(a) Name of aid as it is to appear
on charts. (The general procedure for assigning location and facility names
is contained in Order 7400.2, Part 1, Chapter 3. Any further questions
regarding such names are to be directed to NFDC.)
(b) Type of aid.
(c) Name of city and state where
located.
(d) Coordinates of NAVAID location,
i.e., latitude and longitude in degrees and minutes only.
(e) Airport identifier (if associated
with an airport).
(f) Whether located within airport
boundaries or distance and direction from airport and whether it is intended
to be on any airway.
(g) Whether the frequency of the NAVAID
is allocated to a civil or military government agency, or non-federal
concern.
(h) Whether permanent or temporary. (If
temporary, specify planned period of use.)
(i) Proposed frequency, if available.
(j) Proposed commissioning date.
(k) If an ILS, or to serve a runway,
advise runway number and outer marker name-code. (If second, additional, or partial
ILS, provide outer marker name-code, even though an outer marker is not now
planned. If a fix already exists over the proposed marker site, that name
code should be provided.)
(l) Names and identifiers of the other
navigational aids at the same location.
3. For Weather Offices and Stations:
(a) City and State where located.
(b) Coordinates and elevation of
Weather Station.
(c) Type of Station, as described
in the publication, "National Weather Service Offices and
Stations."
(d) Distance and direction from airport
(e) Type of reports to be originated,
entry station and circuit numbers.
(f) Operator (NWS, Coop Observer,
Military, Airline).
4. For Airspace Fixes Name-Codes:
(a) Name of airway fix as it is to
appear on FAA Form 8260-2 or in an Airspace Docket.
(b) State in which located, or if over
water, associated state.
(c) Type of airways fix (intersection,
way point, coordination, etc.) and fix description (radials/distance), where
applicable, otherwise coordinates or preferably both. If coordination fix
only, reason required.
(d) Upon receipt of name-code from
NFDC, file an FAA Form 8260-2:
(1) To establish an airspace fix.
(2) If converting an existing airspace
fix, to cancel the old fix name.
(3) For Air Traffic Control
Coordination only fixes, include latitude and longitude and specify "no
charting." The ATC Coordination fix will then appear only in the
appropriate Controller Chart Supplement and in the Airspace Fixes Section of
this order.
5. In all cases of identifier requests, include any other
information pertinent to the situation or which may influence the combination
of characters chosen for assignment.
b. Forward request for location identifiers as follows:
1. FAA offices: NFDC, Federal Aviation
Administration, Washington,
D.C. 20591.
2. U.S. Military Facilities and
Commands: Through each appropriate Military Headquarters Office.
3. All others:
(a) Application for
a weather observation/reporting station identifier should be sent to: NOAA
National Weather Service Configuration Management Section W/OSO113 1325 East West Hwy
Silver Spring, MD
20910.
(b) Application for
a non-federal navigational aid identifier is to be made to an air traffic
service area office of the Federal Aviation Administration.
1-4-1
Use of Location Identifiers
An international location indicator is a four-letter code used in
international telecommunications. The location indicator for airports in the
contiguous United States
is the three-letter identifier preceded by "K". For other
non-contiguous United States
airports, the following two letter prefix will be used:
Alaska - PA, PF, PO, PP
Hawaii
- PH
Puerto Rico - TJ
Virgin Islands - TI
(See ICAO Document 7910 for listings.)
1-4-2 Requests for
Assignments of Location Indicators
Send requests for international location indicator assignments as follows:
a. Within the United States and its jurisdictions to:
Aeronautical Information Management, NFDC, Federal Aviation Administration, Washington, DC
20591.
b. From other States (nations) and Territories to: the appropriate
agency within the State or Territory for coordination with ICAO.
1-5-1
United States and Canadian Standard Abbreviations
Standard abbreviations for the United States
and Canada
are used in this order. Other abbreviations used are:
AAF
|
Army Air Field
|
AAWRS
|
Arctic Aviation Weather
Reporting Station
|
AB
|
Air Base
|
ACC
|
Area Control
Center
|
ADIS
|
Automatic Data
Interchange System
|
AFS
|
Air Force Station
|
AHP
|
Army Heliport
|
ANT
|
Coast Guard Aids to
Navigation Team Station
|
ARNG
|
Army National Guard
|
AUT
|
Meteorological Automatic
Reporting Station
|
AWP
|
Aviation Weather
Processors
|
AWRS
|
Aviation Weather
Reporting Station
|
BASIC
|
Basic Contract Observing
|
CFB
|
Canadian Forces Base
|
CCFS
|
Coast Guard Fog Signal
Facility
|
CGLBS
|
Coast Guard Light Boat
Station
|
CGLS
|
Coast Guard Light
Station
|
CGLV
|
Coast Guard Light Vessel
|
CGPSS
|
Coast Guard
Port Safety Station
|
CGS
|
Coast Guard Station
|
CNTR
|
Air Route
Traffic Control
Center
|
COMEDS
|
Continental U.S.
Meteorological Data System (USAF)
|
CONSOLAN
|
Low or
Medium Frequency
Long Range
Navigational Aid
|
CVLN
|
Civilian
|
DARDC Data
|
Device for Automatic
Remote Collection
|
DND
|
Department of National
Defense (Canada)
|
FACIL or FAC
|
Facility
|
FCST PT
|
Forecast Point
|
FIDO
|
Flight Inspection
District Office
|
FSDPS
|
Flight Service Data
Processing System
|
FSS
|
Federal Aviation
Administration Flight Service Station
|
GOM
|
Gulf
of Mexico
|
GEOREF
|
Geographical Reference
Point (VFR flight following, Island
Reporting Service, Pacific Region)
|
IATCS
|
International Air
Traffic Communications Station
|
INS
|
Inertial Navigation
System
|
MARS
|
Marine Aviation
Reporting Station
|
MCAAS
|
Marine Corps Auxiliary
Air Station
|
MCAB
|
Marine Corps Air Base
|
MCAF
|
Marine Corps Air
Facility
|
MCAGCC
|
Marine Corps
Air Ground
Combat Center
|
MCALF Field
|
Marine Corps Auxiliary
Landing
|
MCAS
|
Marine Corps Air Station
|
MCB
|
Marine Corps Base
|
MCOLF
|
Marine Corps Outlying
Field
|
MET
|
Meteorological Station
|
MRBN
|
Marine Radio Beacon
|
NADC
|
Naval
Air Development
Center
|
NAF
|
Naval Air Facility
|
NALF
|
Naval Auxiliary Landing
Field
|
NAS
|
Naval Air Station
|
NAWC
|
Naval
Air Warfare
Center
|
NAWS
|
Naval Air Weapons
Station
|
NOLF
|
Naval Outlying Field
|
NS
|
Naval Station
|
NSA
|
Naval Support Activity
|
ODAPS
|
Oceanic Display Planning
System
|
PAWRS
|
Private Aviation Weather
Reporting
|
R
|
Runway (Canadian Abbr.)
|
RAMOS
|
Remote Automatic
Meteorological Observing Station
|
REDAC
|
Remote Environment Automatic
Data Acquisition Concept
|
RNG
|
Radio Range
|
SA
|
Combined Synoptic and
Aviation Weather Reporting Station
|
SWOS
|
Synoptic Weather
Observation Station
|
TGL
|
Track Guidance Localizer
|
TRANS
|
Transportable
|
USFS
|
U.S. Forest Service
|
VTMS
|
Vessel Traffic
Management System
|
W/A
|
Water Airport/Aerodrome
|
WOS
|
Weather Observation
Station
|
WP
|
Waypoint
|
WSMO
|
Weather Service
Meteorological Observatory
|
WSR
|
Weather Surveillance
Radar
|
|