U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION

Section 3. NAVAID NOTAMs

5-3-1. GENERAL

Technical Operations personnel must ensure the origination of NOTAM Ds concerning NAVAIDs for which they are responsible.

5-3-2. REPORTING NAVAID MALFUNCTIONS

Known or reported malfunctions of a navigational aid must be reported to Technical Operations or appropriate personnel.

5-3-3. UNPROGRAMMED EXTENDED SHUTDOWNS

Unprogrammed, extended facility shutdowns or other unanticipated outages that are expected to last more than 30 days must be promptly reported to NFDC by administrative message or FAX. When possible, the expected duration of the shutdown is to be included in the message.

NOTE-
Except for emergency shutdowns, technical operations personnel are expected to give at least 1 hour notice.

5-3-4. NAVAID MAINTENANCE SHUTDOWNS

Information concerning maintenance shutdown of NAVAIDs that are part of the NAS must be handled as follows:

a. Routine maintenance shutdown. When possible, approval should be obtained sufficiently in advance of the proposed shutdown time to allow dissemination of a NOTAM at least 5 hours before a shutdown will occur. A routine maintenance shutdown request must not be denied because of an inability to issue a NOTAM 5 hours in advance of the shutdown.

b. Emergency shutdown. When possible, obtain at least 1 hour advance notice so that appropriate dissemination may be made before shutdown.

c. Extended maintenance shutdown. Notify the NFDC sufficiently in advance to permit publication of the information prior to the shutdown date. When this is not possible, disseminate a NOTAM no more than 3 days before the shutdown.

5-3-5. UNMONITORED NAVAIDs

a. All VOR, VORTAC, and ILS equipment in the NAS have automatic monitoring and shutdown features in the event of malfunction.

b. When a navigational aid's operational status cannot be monitored at the controlling or monitoring facility, but all indications or reports are the facility is operating normally, Technical Operations personnel must ensure the origination of a NOTAM placing the aid in an unmonitored status.

c. When issuing a NOTAM describing a facility as unmonitored, do not use the category of monitor, only the word “UNMONITORED.”

EXAMPLE-
DCA LDN NAV VOR UNMONITORED

d. If the NAVAID is reported as being out of service, the unmonitored NOTAM must be canceled.

5-3-6. INSTRUMENT LANDING SYSTEM STATUS

a. Category 2 and/or 3 approaches are automatically canceled or not authorized when a NOTAM has been issued for any fundamental component needed for the approaches. Those components are the glidepath, localizer, approach lighting system, and the runway edge lights.

b. Category 2 and/or 3 approaches may not be authorized due to the failure of additional equipment, such as the outer marker inner marker, locator at the outer marker, distance measuring equipment, sequence flashing lights/runway alignment indicator lights, touchdown zone lights, runway centerline lights, RVR touchdown, RVR midpoint, and RVR rollout. The determination of impact to higher category ILS operations will be made by the Technical Operations Control Center specialist in accordance with the guidance contained in FAA Order 6750.24, and a separate NOTAM request for loss of ILS category will be made if the equipment failures warrant this action.

EXAMPLES-
!ATL ATL NAV ILS RWY 8L CAT 2 NA 1311251600­1311251900EST

!ATL ATL NAV ILS RWY 8L CAT 3 NA 1311251600­1311251900EST

!ATL ATL NAV ILS RWY 8L CAT 2/3 NA 1311251600­1311251900EST

5-3-7. NAVAID CONDITIONS

a. Originate a NOTAM D for commissioning, decommissioning, outages, or unmonitored status of NAVAIDs (more than 1 hour or 30 minutes for RADAR) that are part of the NAS. The NOTAM must be canceled by the originator.

b. Restrictions to NAVAIDs are normally published by segment; for example, 020­055 degree radials. To correct a given segment, cancel the original NOTAM and issue a completely new NOTAM. Add “PLUS SEE (publication)” when other restrictions to the NAVAID are published. The absence of this statement from the NOTAM indicates that all other restrictions have been canceled.

EXAMPLES-
!SAV SAV NAV VOR RADIALS 010­030 BEYOND 35NM SFC­2000FT UNUSABLE 1311251600­1311251900EST

!PNC PER NAV VOR RADIALS 045­060 SFC­ 2000FT UNUSABLE 1311011200­1311011600EST

!FMN RSK NAV VOR RADIALS 090­180 BEYOND 25NM SFC-5000FT AND RADIALS 270-300 BEYOND 25NM SFC­5000FT AND RADIALS 300­360 BEYOND 35NM SFC-4000FT UNUSABLE 1311011200-1311011600EST

c. Instrument Landing Systems (ILS).

1. Distinguish components of an ILS from nonprecision approach NAVAIDs by preceding the component with “ILS” followed by “RWY” and the runway number (including single ILS airports).

EXAMPLES-
!SHV SHV NAV ILS RWY 32 110.3 COMMISSIONED 1311251600­PERM

!SUS SUS NAV ILS RWY 8R SNOOP LOM OUT OF SERVICE 1311011200­1311011600EST

!SHV SHV NAV ILS RWY 5 DECOMMISSIONED 1311251600­PERM

!DCA DCA NAV ILS RWY 18 DME OUT OF SERVICE 1311011200­1311011600EST

!DTW DTW NAV ILS RWY 30 LOC RETURN TO SERVICE 1311251600­1311251900EST

!CDR CDR NAV ILS RWY 2 FAN MKR OUT OF SERVICE 1311011200­1311011600EST

!ANB EUF NAV ILS RWY 18 GP SFC­768FT UNUSABLE 1311251600­1311251900EST

!CDR CDR NAV ILS RWY 2 GP/OM/MM OUT OF SERVICE 1311011200­1311011600EST

!DEN DEN NAV ILS RWY 35L OUT OF SERVICE 1311011200-1311011600

NOTE-
This NOTAM states the ILS for RWY 35L is unreliable because it is broadcasting Hazardous Misleading Information.

!DTW DTW NAV ALA ILS RWY 4L LLZ OTS 1311011200-1311011600EST

!DTW DTW NAV ALA LDA RWY 4L LLZ OTS 1311011200-1311011600EST

2. Snow and ice accumulation in the vicinity of glide slope antennas may affect facility performance to the extent that it is inoperative. When this occurs, Technical Operations personnel at the glide slope location are required to initiate appropriate NOTAM D action. Technical operations personnel must monitor snow conditions to determine when conditions permit use of the glide slope and initiate action to cancel the restricting NOTAM.

EXAMPLE-
!DCA DCA NAV ILS RWY 18 GP OUT OF SERVICE 1301051615­1301052015EST

d. Simplified directional facility.

EXAMPLE-
!LOU AAS NAV SIMPLIFIED DIRECTIONAL FACILITY RWY 23 OUT OF SERVICE 1301051615­1301052015EST

e. Localizer type directional aid (LDA).

EXAMPLES-
!DCA DCA NAV LOCALIZER TYPE DIRECTIONAL AID RWY 18 OUT OF SERVICE 1301051615­1301052015EST

!EKN EKN NAV LOCALIZER TYPE DIRECTIONAL AID OUT OF SERVICE 1301051615­1301052015EST

NOTE-
The LDA at the airport is out of service.

f. VOR/DME.

EXAMPLES-
!OJC OJC NAV VOR/DME 113.0/CH 77 COMMISSIONED 1304131800­PERM

!OJC OJC NAV VOR/DME DECOMMISSIONED 1312012300­PERM

!OJC OJC NAV VOR OUT OF SERVICE 1310230100­1310311230EST

!OJC OJC NAV DME OUT OF SERVICE 1301010001­1301051230EST

!OJC OJC NAV DME OUT OF SERVICE 1301010001-1301051230EST

g. VORTAC.

1. VORTAC (all components, VOR/DME/TACAN).

EXAMPLES-
!GSO GSO NAV VORTAC 116.2/ CH 109 COMMISSIONED 1304131800­PERM

!GSO GSO NAV VORTAC DECOMMISSIONED 1304131800­PERM

!OJC OJC NAV VORTAC OUT OF SERVICE 1304131800­1304301200

2. VOR out of service (DME/TACAN operational).

EXAMPLE-
!GSO GSO NAV VOR OUT OF SERVICE 1304131800­1304301200

3. DME out of service (VOR operational/TACAN out).

EXAMPLE-
!GSO GSO NAV TACAN OUT OF SERVICE 1310230100­1310311230EST

NOTE-
When the DME portion of a VORTAC fails or is removed from service for maintenance, the TACAN automatically becomes inoperative.

4. TACAN azimuth out of service (VOR/DME operational).

EXAMPLE-
!GSO GSO NAV TACAN AZM OUT OF SERVICE 1310230100­1310311230EST

5. VOT (VOR Test Facility).

EXAMPLE-
!SBY SBY NAV VOT OUT OF SERVICE 1310242000­1310250300EST

6. VOR Receiver Checkpoint.

EXAMPLES-
!MWA MWA NAV VOR AIRBORNE REC CHECKPOINT OUT OF SERVICE 1310242000­1310250300EST

!BTL BTL NAV VOR GROUND REC CHECKPOINT OUT OF SERVICE 1310242000­1310250300EST

!LRD LRD NAV VOR GROUND REC CHECKPOINT FOR TWY A OUT OF SERVICE 1310242000­1310250300

NOTE-
There are two separate Ground Receiver Checkpoints for LRD VOR at (LRD), Laredo, Texas.

h. TVOR.

1. TVORs serving one airport, and not associated with airway structure, must have NOTAMs issued using the associated airport identifier as the affected facility.

EXAMPLE-
!ILN ILN NAV MXQ VOR OUT OF SERVICE 1310242000­1310250300EST

2. TVORs serving more than one airport, or associated with airway structure, must have NOTAMs issued using the TVOR identifier as the affected facility.

EXAMPLE-
!DAY XUB NAV VOR OUT OF SERVICE 1310242000­1310250300EST

i. NDB or LOM as follows:

1. Terminal NDBs. Those NDBs located on or serving only that airport must have NOTAMs issued using the associated airport as the affected facility.

EXAMPLE-
!DCA DCA NAV GTN NDB OUT OF SERVICE 1310242000­1310250300EST

2. If an NDB serves more than one airport, or associated with an airway route structure, issue a NOTAM using the identifier of the NDB as the affected facility.

EXAMPLE-
!RKD SUH NAV NDB OUT OF SERVICE 1309241430­1309241700EST

NOTE-
SUH serves 2B7 and RKD.

3. LOM outages.

(a) LOM serving one airport must be issued with the three-letter identifier of the airport as the affected location.

EXAMPLES-
!SBY SBY NAV ILS RWY 32 COLBE LOM OUT OF SERVICE 1309241430­1309241700EST

!SUS SUS NAV ILS RWY 8R SNOOP LOM OUT OF SERVICE 1309241430­1309241700EST

NOTE-
Except in Alaska, collocated LOMs are assigned five­letter names. All other NDBs are assigned three­letter identifiers.

(b) LOM serving more than one airport must be issued under the three­letter identifier of each airport that it serves. This procedure may require coordination with other facilities.

EXAMPLES-
!MCI MCI NAV ILS RWY 9 HUGGY LOM OUT OF SERVICE 13010241300­1310241700EST

!FLV FLV NAV HUGGY NDB OUT OF SERVICE 1311241300­1311241700EST

NOTE-
In the above examples, Huggy NDB serves as a LOM to runway 9 at Kansas City Intl (MCI). It also serves Fort Leavenworth/Sherman AAF (FLV), Kansas, as an NDB.

j. NAVAID identification change.

EXAMPLE-
!IND IND NAV VORTAC ID CHANGED TO VHP 1301011200­PERM

k. Global Positioning System (GPS).

1. All global positioning system pseudo-random noise (PRN) GPS satellite outages will be reported directly to the USNOF by the Air Force Space Command (AFSPACECOM) monitoring facility. The USNOF will issue NOTAMs under the accountability “GPS” with a location of “GPS.” When these NOTAMs get distributed internationally, the USNOF changes the designator “KNMH.”

EXAMPLE-
 !GPS GPS NAV PSEUDO RANDOM NOISE 16 OUT OF SERVICE 1309231600-1309242300EST

NOTE-
1. Global positioning system pseudo-random noise (PRN) number 16 is out of service from September 23, 2013, at 1600 until September 24, 2013, at 2300.

2. Use standard request/reply procedures to obtain all current GPS NOTAMs.

EXAMPLES-
GG KDZZNAXX
121413 KDCAYFYX
)SVC RQ DOM LOC=GPS
or
GG KDZZNAXX
121413 KDCAYFYX
)SVC RQ INT LOC=KNMH
or
ORIGIN: PRECEDENCE:GG TIME:
ACK:N
ADDR:KDZZNAXX
TEXT:)SVC RQ INT LOC=KNMH

NOTE-
GPS operations are included in the Aeronautical Information Manual.

2. All GPS interference testing NOTAMs will be reported to the USNOF by Technical Operations ATC Spectrum Engineering Services, Spectrum Assignment and Engineering Services. The USNOF will format NOTAMs under the accountability “GPS” with an affected location of the associated center.

EXAMPLE-
!GPS ZAB NAV GPS SIGNAL WITHIN A CONE SHAPED AREA DEFINED AS A CIRCLE CENTERED AT 310535N0930350W (AEX 251.4 RADIAL AT 30.5NM) DECREASING IN AREA WITH A DECREASE IN ALTITUDE DEFINED AS:
270NM RADIUS OF 310535N0930350W FL400­UNL,
220NM RADIUS OF 310535N0930350W FL250,
150NM RADIUS OF 310535N0930350W 10000FT,
110NM RADIUS OF 310535N0930350W 4000FT AGL,
50NM RADIUS OF 310535N0930350W 50FT AGL UNREL DAILY 0600-1200 1311160600- 1311191200EST

NOTE-
Spectrum Assignment and Engineering Services will notify the flight service station with the new NOTAM information.

l. Wide Area Augmentation System (WAAS). WAAS area­wide NOTAMs are originated when WAAS assets are out of service and impact the service area. The term “MAY NOT BE AVBL” indicates that due to ionospheric conditions, lateral guidance may still be available when vertical guidance is unavailable. Under certain conditions, both lateral and vertical guidance may be unavailable. USNOF distributes these as FDC NOTAMs when a WAAS asset failure affects a large area, or as Center NOTAMs if all airports with RNAV approaches within a center's boundary do not have WAAS availability. USNOF utilizes templates provided by Technical Operations, WAAS Operations. All events must reflect an effective time and expiration time.

1. Unscheduled loss of signal or service.

EXAMPLES-
!FDC FDC NAV WAAS NOT AVBL 1311160600- 1311191200EST

!FDC ZAN NAV WAAS SIGNAL NORTH OF LINE DEFINED AS 6800N14000W TO 5400N16000W MAY NOT BE AVBL. WAAS USERS SHOULD CONFIRM RAIM AVAILABILITY FOR IFR OPERATIONS IN THIS AREA. T­ROUTES IN THIS SECTOR NOT AVBL. ANY REQUIRED ALTERNATE AIRPORT IN THIS AREA MUST HAVE AN APPROVED INSTRUMENT APPROACH PROCEDURE OTHER THAN GPS THAT IS ANTICIPATED TO BE OPERATIONAL AND AVAILABLE AT THE ESTIMATED TIME OF ARRIVAL AND WHICH THE AIRCRAFT IS EQUIPPED TO FLY. 1304210800­1304242000EST

2. Ionosphere storm conditions.

EXAMPLES-
!FDC FDC NAV WAAS VNAV/LPV/LP MINIMA MAY NOT BE AVBL 1306111330­1306141930EST

!FDC FDC NAV WAAS VNAV/LPV MINIMA NOT AVBL, WAAS LP MINIMA MAY NOT BE AVBL 1306021200­1306031200EST

3. Scheduled loss of signal or service.

EXAMPLES-
!FDC FDC NAV WAAS NOT AVBL 1312041015­1312082000EST

!FDC ZAN NAV WAAS SIGNAL NORTH OF LINE DEFINED AS 7000N15000W TO 6400N16400W MAY NOT BE AVBL. WAAS USERS SHOULD CONFIRM RAIM AVAILABILITY FOR IFR OPERATIONS IN THIS AREA. T­ROUTES IN THIS SECTOR NOT AVBL. ANY REQUIRED ALTERNATE AIRPORT IN THIS AREA MUST HAVE AN APPROVED INSTRUMENT APPROACH PROCEDURE OTHER THAN GPS THAT IS ANTICIPATED TO BE OPERATIONAL AND AVAILABLE AT THE ESTIMATED TIME OF ARRIVAL AND WHICH THE AIRCRAFT IS EQUIPPED TO FLY. 1304210800­1304242000EST

m. Ground Based Transceiver (GBT) when used as a published ground based navigation aid; for example, as used for CAPSTONE.

1. When a GBT is out of service and/or expected by Technical Operations personnel to be out of service, issue a NOTAM D.

2. The identifier used for the issuance of NOTAMs must be the three-letter identification where the GBT is located.

3. A GBT service is comprised of Flight Information Service Broadcast (FIS­B) and Traffic Information Service Broadcast (TIS­B). When one of these broadcasts is out of service and/or expected by Technical Operations personnel to be out of service issue a NOTAM D.

EXAMPLES-
!BET BET NAV GROUND BASED TRANSCEIVER OUT OF SERVICE 1312070800­1312101800EST

!ANI ANI NAV GROUND BASED TRANSCEIVER OUT OF SERVICE 1309211600­1309211900EST

n. Ground Based Augmentation System (GBAS). Originate NOTAMs when the GBAS is out of service for maintenance reasons or predicted to be out of service. GBASs are operated by non­federal service providers.

1. Unscheduled loss of signal or service.

!IAH IAH NAV GBAS OUT OF SERVICE 1309211600-1309211900EST

!EWR EWR NAV GLS RWY 4R, RWY 4L, RWY 11, RWY 22R, RWY 22L OUT OF SERVICE 1307182135-1307182200

2. Predicted loss of signal or service of the GBAS Landing System (GLS).

EXAMPLE-
!IAH IAH NAV GLS NOT AVBL 1302101944­1302102001

NOTE-
When one or more multiple GLS approaches are predicted to not be available.

5-3-8. HOURS OF OPERATION

Changes in the hours of operation of a NAVAID due to other than seasonal daylight time changes.

EXAMPLE-
!SBY SBY NAV ILS RWY 32 UNMONITORED DLY 0200­0900 1310140200-1310160900EST