Text NOTAM production rules

This section provides rules for the automated production of the text NOTAM message items, based on the AIXM 5.1.1 data encoding of the Event. Therefore, AIXM specific terms are used, such as names of features and properties, types of TimeSlices, etc:

  • the abbreviation RDN.BL. indicates that the corresponding data item must be taken from the RunwayDirection BASELINE;

  • the abbreviation AHP.BL. indicates that the corresponding data item must be taken from the AirportHeliport BASELINE associated with the Runway that is associated with the RunwayDirection concerned;

  • the abbreviation RWY.BL. indicates that the corresponding data item must be taken from the Runway BASELINE associated with the RunwayDirection concerned;

  • the abbreviation RDN.TD. indicates that the corresponding data item must be taken from the RunwayDirection TEMPDELTA that was created for the Event.

    • Notes:

      1. According to encoding rule ER-01, each RunwayDirection of the Runway concerned by the closure will have a TEMPDELTA encoded. However, the closure information will be identical for all runway directions. Therefore, if not specified otherwise, the RDN.TD referred in the NOTAM production rules below shall be the one of the RunwayDirection with the lowest designator number;

      2. According to encoding rule ER-02, the TEMPDELTA might also include ManoeuvringAreaAvailability elements that have been copied from the BASELINE data for compliance with the AIXM Temporality rules. The current practice is to not include such static information in the NOTAM text. Therefore, all ManoeuvringAreaAvailability that have operationalStatus=NORMAL (they also have an associated annotation with purpose=REMARK and the text="Baseline data copy. Not included in the NOTAM text generation") will be ignored for the NOTAM generation.

Item A

The item A shall be generated according to the general production rules for item A using the Event.concernedAirportHeliport,

Item Q

Apply the common NOTAM production rules for item Q, complemented by the following specific rules for this particular scenario:

Q code

The following mapping shall be used: 

Note: In this table, "any" means "any value or no value (NIL)".

RDN.TD.availability.ManoeuvringAreaAvailability.

Corresponding Q code

timeIntervalusage.ManoeuvringAreaUsage

RWY.BL.type

type

operationpriorPermission../FlightCharacteristics../AircraftCharacteristics'RWY''FATO'
not NIL'PERMIT''ALL'NILNILNILQMRAHQFPAH
any'RESERVE'anyanyonly military='MIL'anyQMRAMQFPAM
any'CONDITIONAL'anynot NILanyanyQMRAPQFPAP
any'PERMIT'anyNILanyanyQMRARQFPAR
any'RESERVE'anyanyonly origin='HOME_BASED'anyQMRLBQFPLB
any'FORBID'anyanyanyweight not NILQMRLHQFPLT
any'FORBID'anyanyrule = 'IFR'anyQMRLIQFPLI
any'CONDITIONAL'anyanyanywingSpan not NILQMRLLN/A
any'FORBID'anyanyrule = 'VFR'anyQMRLVQFPLV
any other combinationQMRLTQFPLT


Scope

Insert the value ‘A’.

Lower limit / Upper limit

Use “000/999”

Geographical reference

Insert the coordinate of the ARP (aerodrome reference point) of the airport (AHP.BL.ARP.ElevatedPoint), formatted as follows:

  • the set of coordinates comprises 11 characters rounded up or down to the nearest minute; i.e. Latitude (N/S) in 5 characters; Longitude (E/W) in 6 characters;

  • the radius value is “005”.

Items B, C and D

Items B and C shall be decoded following the common production rules.

If at least one RDN.TD.availability.ManouevringAreaAvailability.timeInterval exists (i.e. the Event has an associated schedule), then all such Timesheet(s) shall be represented in item D according to the common NOTAM production rules for {{Item D, E - Schedules}}. Otherwise, item D shall be left empty.

Item E

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

EBNF Code
template = ["(1)" "AHP.BL.type(2)" ("AHP.BL.name(3a)" | "AHP.BL.ARP(3b)")  ]  "\n" \n
["unpaved(4)"] "RWY.BL.type(5)" "RDN.BL.designator(6)" "RDN.TD.usage.type(7)" \n
(["RDN.TD.usage.flight(8)"] ["RDN.TD.usage.aircraft(9)"] "RDN.TD.usage.operation(10)" ["conditions(11)"]) { "(12)" "," (["RDN.TD.usage.flight(8)"] ["RDN.TD.usage.aircraft(9)"] "RDN.TD.usage.operation(10)" ["conditions(11)"])} \n 

template_bottom =
["\n" "due to" "RDN.TD.availability.annotation(13)" "\n"] \n
{"." "RDN.TD.availability.annotation(14)" "\n"} ["."].


Reference

Data item (from coding scenario)

Rule

(1)


If AHP.BL.locationIndicatorICAO is not null, then ignore this branch.

(2)


Insert here the type of the airport decoded as follows

AHP.BL.type

Text to be inserted in Item E

AD or AH

"AD"

HP

"Heliport"

LS or OTHER

"Landing site"

(3)

airport name
  1. If AHP.BL.name is not NIL, then insert it here. Otherwise:

  2. insert here the text "located at" followed by the AHP.BL.ARP.ElevatedPoint decoded according to the text NOTAM production rules for aixm:Point

(4)

runway surface composition

Insert the word “unpaved” if RWY.BL.SurfaceCharacteristics.composition has one of the values 'CLAY, CORAL, EARTH, GRASS, GRAVEL, ICE, LATERITE, MACADAM, SAND, SNOW, WATER, OTHER'. Otherwise do not insert anything.

(5)

runway

Insert here the type of the Runway decoded as follows

RWY.BL.type

Text to be inserted in Item E

RWY

"RWY"

FATO

"FATO"

(6)

runway direction

If more than one RunwayDirection has a TEMPDELTA associated with the Event, then insert the designator of each additional RunwayDirection, preceded by "/", starting with the one with the lower designator number. In general, a runway has two landing directions but there may exist very rare situations with 3-4 landing directions.

(7)

conditional for

closed, except for

prohibited for

additionally allowed for

Insert here RDN.TD.availability.ManoeuvringAreaAvailability.usage.ManoeuvringAreaUsage as follows:

type

Text to be inserted in item E

"CONDITIONAL""available for"
"RESERV""closed, except for"
"FORBID""prohibited for"
"PERMIT""now available for"
(8)flight

Decode here each FlightCharacteristics property that was specified, as detailed below. If more than one FlightCharacteristics property was used, insert blanks between consecutive properties.

FlightCharacteristics.type*

Text to be inserted in Item E

OAT

"Operational Air Traffic"

GAT

"General Air Traffic"

ALL

"Operational Air Traffic/General Air Traffic"

OTHER:FREE_TEXT

"free text" (replace "_" with blanks)

*Note: type is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.rule

Text to be inserted in Item E

IFR

"IFR"

VFR

"VFR"

ALL*

"IFR/VFR"

OTHER:FREE_TEXT

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.status

Text to be inserted

HEAD

"Head of State"

STATE

"State acft"

HUM

"HUM"

HOSP

"HOSP"

SAR

"SAR”

EMERGENCY

"EMERG"

ALL

"State acft/HUM/HOSP/SAR/EMERG"

OTHER:MEDEVAC

“MEDEVAC”

OTHER:FIRE_FIGHTING

“fire fighting”

OTHER:FREE_TEXT

"free text" (replace "_" with blanks and convert to lowercase)

FlightCharacteristics.military

Text to be inserted in Item E

MIL

"MIL acft"

CIVIL

"civil acft"

ALL*

"civil/MIL acft"

OTHER:FREE_TEXT*

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.origin

Text to be inserted

NTL

"domestic"

INTL

"intl"

HOME_BASED

"home based"

ALL*

"domestic/intl"

OTHER:FREE_TEXT*

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.purpose

Text to be inserted

SCHEDULED

"scheduled"

NON_SCHEDULED

"not scheduled"

PRIVATE*

"private"

AIR_TRAINING

"training"

AIR_WORK*

"aerial work"

PARTICIPANT

"participating acft"

ALL*

"scheduled/not scheduled/private/training/aerial work/participating acft"

OTHER:FREE_TEXT*

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

(9)

aircraft

Decode here each AircraftCharacteristics property that was specified, as detailed below. If more than one AircraftCharacteristics property was used, insert blanks between consecutive properties.

AircraftCharacteristics.type

Text to be inserted in Item E

LANDPLANE

"landplanes"

SEAPLANE*

"seaplanes"

AMPHIBIAN

"amphibians"

HELICOPTER

"hel"

GYROCOPTER

"gyrocopters"

TILT_WING

"tilt wing acft"

STOL

"short take-off and landing acft"

GLIDER*

"gliders"

HANGGLIDER*

"hang-gliders"

PARAGLIDER*

"paragliders"

ULTRA_LIGHT*

"ultra lights"

BALLOON*

"balloons"

UAV*

"unmanned acft”

ALL*

"all acft types"

OTHER:FREE_TEXT

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

AircraftCharacteristics.engine

Text to be inserted in Item E

JET

"jet acft"

PISTON

"piston acft"

TURBOPROP

"turboprop acft"

ELECTRIC

“electric engine acft”

ALL

"all engine types"

OTHER:FREE_TEXT

"free text" (replace "_" with blanks)


AircraftCharacteristics.wingSpan - insert the value followed by the value of the uom attribute. Prefix with the value of AircraftCharacteristics.wingSpanInterpretation, decoded as indicated in the following table:

AircraftCharacteristics.wingSpanInterpretation

Text to be inserted in Item E

ABOVE

"acft with wingspan more than"

AT_OR_ABOVE

"acft with wingspan equal to or more than"

AT_OR_BELOW

“acft with wingspan equal to or less than"

BELOW

"acft with wingspan less than"

OTHER:FREE_TEXT*

"free text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

AircraftCharacteristics.weight - insert the value followed by the value of the uom attribute. Prefix with the value of AircraftCharacteristics.weightInterpretation, decoded as indicated in the following table:

AircraftCharacteristics.weightInterpretation

Text to be inserted in Item E

ABOVE

"acft mass heavier than"

AT_OR_ABOVE

"acft mass equal to or heavier than"

AT_OR_BELOW

"acft mass equal to or lighter than"

BELOW

"acft mass lighter than"

OTHER:FREE_TEXT*

"free text" (replace "_" with blanks)


*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

(10)

operation

Decode here the RDN.TD.availability.usage.operation as follows:

TD.usage.operation

Text to be inserted in Item E

LANDING

"landing"

TAKEOFF

"tkof

TOUCHGO

"tgl"

TRAIN_APPROACH

"practice low approaches"

TAXIING

"taxiing"

CROSSING

"crossing"

AIRSHOW

"acft participating in air display”

ALL*

"all operations"*

OTHER:MY_TEXT"my text" (replace "_" with blanks and convert to lowercase)

*Note: if all operations are affected, then either provide the text as described above or do not provide the text at all.

(11)

PPR time

PPR details

If RDN.TD.usage.priorPermission is not NIL, then insert here the decoding of the PPR information as detailed in the following diagram:

EBNF Code
condition_PPR = "PPR " "RDN.TD.usage.priorPermission(11.1)" ["RDN.TD.usage.annotation(11.2)"].


Reference

Rule

(11.1)

Insert here the value of the priorPermission attribute followed by its unit of measurement decoded according to the {{text NOTAM production rules for duration}}

(11.2)

Decode here the annotation with propertyName="priorPermission" and purpose="REMARK", according to the decoding rules for annotations.

(12)


If more than one RDN.TD.availability.ManoeuvringAreaAvailability.ManoeuvringAreaUsage.type element is present, then select and decode the additional ManoeuvringAreaUsage branch consecutively.

(13)reasonIf there exists a RDN.TD.ManoeuvringAreaAvailability.annotation with propertyName="operationalStatus" and purpose='REMARK' (the reason for limitation, according to the coding rules), then translate it into free text according to the decoding rules for annotations. 

(14)

note

Annotations of RDN.TD.ManoeuvringAreaAvailability shall be translated into free text according to the decoding rules for annotations.

Note: The objective is to full automatic generation, without human intervention. However, the implementers of the specification might consider reducing the cost of a fully automated generation by allowing the operator to fine-tune the text in order to improve its readability (with the inherent risk for human error, when re-typing is allowed).

Items F & G

Leave empty.

Event Update

The eventual update of this type of event shall be encoded following the general rules for [archived] Event 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:

EBNF Code
template_cancel = ["(1)" "AHP.BL.type (2)" ("AHP.BL.name (3a)" | "AHP.BL.ARP (3b)")  ] ["unpaved(4)"] "RWY.BL.type(5)" "RDN.BL.designator(6)" ("resumed normal operations." | " : New NOTAM to follow.(15)").

Reference

Rule

(15)

If the NOTAM will be followed by a new NOTAM concerning the same situation, then the operator shall have the possibility to choose the "New NOTAM to follow" 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”. 

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