Editing NOTAM (section)

==U.S. domestic NOTAMs==
In the United States, NOTAMs are classified by the [[Federal Aviation Administration|FAA]] into five categories:<ref>AIM, 5–1–3 "Notice to Airmen (NOTAM) System" (August 22, 2013 revision)</ref>

;NOTAM (D) or distant NOTAMs
:A NOTAM (D) information is disseminated for all navigational facilities that are part of the [[National Airspace System]] (NAS), all public use airports, seaplane bases, and [[heliport]]s listed in the [[Airport/Facility Directory]] (A/FD) (e.g.,&nbsp;such information as whether or not an airport or a certain facility is usable). NOTAM (D) information includes, among other topics, such data as taxiway closures, personnel and equipment near or crossing runways, and airport lighting aids that do not affect [[instrument approach]] criteria, such as [[VASI]].

;Flight Data Center (FDC) NOTAMs
:The National Flight Data Center will issue these NOTAMs when it becomes necessary to disseminate information that is regulatory in nature, and they contain such things as amendments to published [[instrument approach procedure|IAPs]] and other current [[aeronautical chart]]s. They are also used to advertise [[temporary flight restriction]]s caused by such things as natural disasters or large-scale public events that may generate congestion of air traffic over a site.

;Pointer NOTAMs
:NOTAMs issued by a flight service station to highlight or point out another NOTAM, such as an FDC or NOTAM (D) NOTAM. This type of NOTAM will assist users in cross-referencing important information that may not be found under an airport or [[NAVAID]] identifier.

;Special activity airspace (SAA) NOTAMs
:SAA NOTAMs are issued when SAA (the term "SAA" includes [[special use airspace|SUA]], as well as instrument and visual military training routes, aerial refueling tracks and anchors<ref name=7930.2>{{cite web |url=http://www.faa.gov/regulations_policies/orders_notices/index.cfm/go/document.information/documentID/1021828 |title=FAA Order JO 7930.2N, Notices to Airmen (NOTAM) |date=2013-10-01 |access-date=2014-02-26}}</ref>) will be active outside the published schedule times and when required by the published schedule.

;Military NOTAMs
:NOTAMs pertaining to U.S. Air Force, Army, Marine, and Navy [[navigational aid]]s/airports that are part of the NAS.

=== Format ===

From left to right, U.S. NOTAMs contain the following elements:

* An exclamation point
* Accountability Location (using the [[Location identifier#FAA identifier|FAA identifier]])
* Affected Location (using the [[Location identifier#FAA identifier|FAA identifier]])
* One of the following keywords
{| class="wikitable"
|-
 !Keyword !! Meaning
|-
 | RWY || Runway 
|-
 | TWY || Taxiway
|-
 | RAMP || Terminal ramp 
|-
 | APRON || [[Airport apron]]
|-
 | AD || Aerodrome/Airport 
|-
 | OBST || Obstruction 
|-
 | NAV || Anything relating to navigational equipment, e.g. [[VHF omnidirectional range|VOR]] or [[Non-directional beacon|NDB]] being out of service. 
|-
 | COM || Any other communications, e.g. [[Automatic terminal information service|ATIS]]. 
|-
 | SVC || When tower, fuel, customs service hours are available.
|-
 | AIRSPACE || The [[airspace]] surrounding the affect location. 
|-
 | U || Other aeronautical information, but unverified. 
|-
 | O || Other aeronautical information.
|}
* Surface Identification (i.e., the runway or taxiway number)
* Condition
* Time

These NOTAMS are likely to use [https://www.faa.gov/documentLibrary/media/Order/CNT.pdf FAA-specific abbreviations].

==== Examples ====

: !ORT 6K8 (U) RWY ABANDONED VEHICLE
Tok Junction Airport has an unverified vehicle that is abandoned on its runway.

: !LAX LAX NAV VOR OTS
Los Angeles International's VOR is out of service.

: !OSH OSH AIRSPACE AIRSHOW ACFT 5000/BLW 5 NMR AIRPORT AVOIDANCE ADZD WEF 0707152000-0707152200
There is an airshow being held at Oshkosh airport with aircraft flying 5,000 feet and below within a 5 nautical mile radius.  Avoidance is advised from 2000 UTC on July 15, 2007, until 2200 on July 15, 2007.

=== Incidents ===
On 11 January 2023, the [[2023 FAA system outage|US NOTAM system failed]], which grounded all domestic flights until 9:00 AM EST (UTC-5) the same day.<ref>{{Cite web |date=11 January 2023 |title=FAA NOTAMS Statement |url=https://www.faa.gov/newsroom/faa-notams-statement |access-date=11 January 2023 |website=Federal Aviation Administration}}</ref><ref>{{Cite news |last1=Freed |first1=Jamie |last2=Singh |first2=Rajesh Kumar |last3=Shepardson |first3=David |date=2023-01-11 |title=U.S. flights beginning to resume after FAA system outage |language=en |work=Reuters |url=https://www.reuters.com/business/aerospace-defense/us-faa-says-flight-personnel-alert-system-not-processing-updates-after-outage-2023-01-11/ |access-date=2023-01-11}}</ref>