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Text NOTAM production rules

...

NAV.TD.operationalStatus

Corresponding Q codes (4th and 5th letters)

UNSERVICEABLE

AS

ONTEST

CT

INTERRUPT

LS

PARTIAL

AS

FALSE_INDICATION

XX

DISPLACED

CM

IN_CONSTRUCTION

XX

OTHER

XX   

Scope

Insert here AE. 

Items B, C and D

...

Reference

Rule

(1)

The name of the Navaid shall be included if present in the NAV.BL data

(2)

Insert the type from the Navaid baseline, according to the following decoding rule:

NAV.BL.type

Text to be inserted in item E

VOR

"VOR"

DME

"DME"

NDB

If (E)BL.class=N then use the word "LOCATOR", otherwise use the word "NDB"

TACAN

"TACAN"

MKR

If used as NavaidComponent of an ILS or ILS_DME Navaid, then insert (N)BL.markerPosition first followed by "MKR", otherwise insert just the word "MKR"

ILS

"ILS"

ILS_DME

"ILS"

MLS

"MLS"

MLS_DME

"MLS"

VORTAC

"VORTAC"

VOR_DME

"VOR/DME"

DNB_DME

"NDB/DME"

TLS

"Transponder Landing System"

LOC

"LOC"

LOC_DME

"LOC/DME"

NDB_MKR

"NDB/MKR"

DF

"DF service"

SDF

"Simplified Directional Facility eqpt"

OTHER

None

(3)

If the Navaid Baseline has several Navaid components and only one of its primary component NavaidEquipment has a NEQ.TD associated with the Event, then insert the type of that equipment, according to the following decoding rule:

NEQ.BL

Text to be inserted in Item E

DME

"DME part"

VOR

"VOR part"

TACAN

"TACAN part"

Glidepath

"GP part"

Localizer

"LOC part"

Azimuth

"azm signal"

Elevation

"elev signal"

SDF

"Simplified Directional Facility eqpt"

DirectionFinder

"DF"

NDB

If (E)BL.class=N then use the word " LOCATOR", otherwise use the word "NDB"

MarkerBeacon

If used as NavaidComponent of an ILS or ILS_DME Navaid, then insert (N)BL.NavaidComponent.markerPosition first followed by "MKR", otherwise insert just the word "MKR"

(4)

If NAV.BL is TACAN or VORTAC and its (TACAN)TD.availability.signalType is specified, then insert its value here.

(5)

The following rules apply:

  • If NAV.BL.type has the value ILS, ILS_DME, LOC, LOC_DME, MLS or MLS_DME, then insert the RunwayDirection.BL.designator of the associated NAV.BL.runwayDirection, if available;
  • Otherwise, insert the NAV.BL.designator, if available.

(6)

Apply the following rules:

NAV.BL.type

Use the following value

VOR, VOR_DME, VORTAC

(VOR)BL.frequency followed by its uom value

NDB, NDB_MKR, NDB_DME

(NDB)BL.frequency followed by its uom value

SDF

(SDF)BL.frequency followed by its uom value

any other

leave empty

(7)

Apply the following rules:

NAV.BL.type

Use the following value

VOR_DME, DME, NDB_DME

(DME)BL.channel

TACAN, VORTAC

(TACAN)BL.channel

any other

leave empty

(8)

Insert the NEQ.TD.operationalStatus decoded as follows:

NEQ.BL.availability/operationalStatus

Text to be inserted in Item E

UNSERVICEABLE

"unserviceable"

ONTEST

"On test, do not use. False indication possible."

INTERRUPT

"subject to interruption"

PARTIAL

"unserviceable" (note that this should only occur for TACAN components)

FALSE_INDICATION

"do not use, false indication"

DISPLACED

"displaced"

IN_CONSTRUCTION

"in construction, do not use"

OTHER

"operational status is affected"

(9)

If specified, insert here only the NEQ.TD.NavaidOperationalStatus.annotation that has propertyName="operationalStatus" and purpose="REMARK", translated into free text according to the following encoding rules.

(10)

Annotations shall be translated into free text according to the rules for annotations decoding.

...

The eventual update of this type of event shall be encoded following the general rules for {{Event updates update or cancellation}}, which provide instructions for all NOTAM fields, except for item E and the condition part of the Q code, in the case of a NOTAM C

If a NOTAM C is produced, then the 4th and 5th letters (the "condition") of the Q code shall be "AK", except for the situation of a “new NOTAM to follow", in which case “XX”shall be used.

The following pattern should be used for automatically generating the E field text from the AIXM data:

Image RemovedImage Added

Code Block
titleEBNF Code
collapsetrue
template_cancel = ["NAV.BL.name(1)"] "NAV.BL.type(2)" ["NEQ.BL.type(3)"]\n [( "NAV.BL.designator(5)" | "RWY-" "NAV.BL.runwayDirection(5)")] \n
["NEQ.BL.frequency(6)"] ["NAV.BL.channel(7)"] ("resumed normal operations""."\n | [" : New NOTAM to follow(11)"]).

Reference

Rule

(11)

If the NOTAM will be followed by a new NOTAM concerning the same situation, then the operator shall have the possibility to

specify

choose the "New NOTAM to follow"

and this text shall be appended at the end of item E of the NOTAM C

branch.  This branch cannot be selected automatically because this information is only known by the operator.

Note: in this case, the 4th and 5th letters of the Q code shall also be changed into “XX”.