FREQUENCY [Frequency]
An entity type, the occurrences of which contain one or two (communication) frequencies used to provide a service as follows:
- one way broadcast (e.g. ATIS); VAL_FREQ_TRANS contains transmission frequency, and VAL_FREQ_REC contains NULL
- two-way radio communication on the same frequency (single channel simplex); both VAL_FREQ_TRANS and VAL_FREQ_REC contain the same frequency
- two-way radio communication on two distinct frequencies (double channel simplex, offset frequency simplex, duplex); VAL_FREQ_TRANS contains the transmission frequency and VAL_FREQ_REC contains the reception frequency (as seen by the service provider).
Attributes
VAL_FREQ_TRANS [Transmission frequency] mandatory
The value of the transmission frequency.
Domain: VAL_FREQ
VAL_FREQ_REC [Reception frequency] optional
The value of the reception frequency.
Domain: VAL_FREQ
UOM_FREQ [Unit of measurement [frequency]] mandatory
The unit of measurement of the frequency.
Domain: UOM_FREQ
CODE_TYPE [Type] optional
A code indicating if a frequency is 'special' or 'non-standard' .
For example, emergency, alternate or guard etc..
Domain: CODE_TYPE_FREQ
CODE_EM [Emission] optional
A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference.
For example, A3E, etc..
Domain: CODE_EM_RDO
CODE_SELCAL [SELCAL treated] optional
A code indicating if whether or not a frequency treats SELCAL.
This attribute is a yes/no option.
Domain: CODE_YES_NO
TXT_RMK [Remark] optional
Domain: TXT_RMK
FUEL [Fuel]
Fuel types used for aircraft/helicopters.
Attributes
CODE_CAT [Category] mandatory
A code indicating the category of fuel.
For example, Jet, AVGAS, etc..
Domain: CODE_CAT_FUEL
TXT_DESCR [Description] optional
A textual description of the fuel.
Domain: TXT_DESCR
TXT_RMK [Remark] optional
Domain: TXT_RMK
GATE_STAND [Parking position stand or gate]
A stand or a gate at an aerodrome/heliport which may be used by aircraft/helicopters as a parking position.
Rules:
  1. The position given by GEO_LAT, GEO_LONG must be plausibly close (less than 20 KM) to that of the ARP of the related AD_HP.
Attributes
TXT_DESIG [Designator] mandatory
The textual designator of the gate/stand.
For example, 13, 84 A, etc..
Domain: TXT_DESIG
CODE_TYPE [Type] mandatory
A code indicating the type of parking position.
Domain: CODE_TYPE_STAND
TXT_DESCR_RESTR_USE [Description of restrictive use] optional
A full textual description of the restrictive use of a gate/stand.
For example, 1) The stand is for Boeing 737, Airbus 320, and similar;
For example, 2) The stand is not for Airbus 340, Boeing 747 or similar.
Domain: TXT_DESCR
GEO_LAT [Latitude] mandatory
The latitude of the parking position.
Domain: GEO_LAT
GEO_LONG [Longitude] mandatory
The longitude of the parking position.
Domain: GEO_LONG
CODE_DATUM [Datum] mandatory
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
Rules:
  1. All geographical coordinates should be expressed in the WGS 84 system.
Domain: CODE_DATUM
VAL_GEO_ACCURACY [Geographical accuracy] optional
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
Rules:
  1. If VAL_GEO_ACCURACY is specified , then UOM_GEO_ACCURACY is mandatory.
Domain: VAL_DIST_HORZ
UOM_GEO_ACCURACY [Unit of measurement [geographical accuracy]] optional
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
Domain: UOM_DIST_HORZ
VAL_ELEV [Elevation] optional
The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
Rules:
  1. If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
Domain: VAL_DIST_VER
VAL_ELEV_ACCURACY [Elevation accuracy] optional
The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
Rules:
  1. VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
Domain: VAL_DIST_VER
VAL_GEOID_UNDULATION [Geoid undulation] optional
A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
Rules:
  1. VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
Domain: VAL_DIST_VER
UOM_DIST_VER [Unit of measurement [vertical distance]] optional
The unit of measurement for vertical distances: elevation, geoidal undulation.
Domain: UOM_ELEV
VAL_CRC [Cyclic redundancy check] optional
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
Notes:
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
Domain: VAL_HEX
TXT_VER_DATUM [Vertical Datum] optional
Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example, "AMSTERDAM GAUGE", "NEWLYN" etc.).
Domain: TXT_DESCR
TXT_RMK [Remark] optional
Domain: TXT_RMK
GEO_BORDER [Physical or political border]
A physical or political border. In general, it will be the border between two countries or States but could also be a coastline, the description of the bank of an important river, or any other geographical shape which can be named and used to describe the border of an airspace. If two countries/States have more than one common border, each one will be an occurrence of this entity.
Rules:
  1. All GEO_BORDERs must be open shapes. Therefore, each GEO_BORDER must have one and only one related GEO_BORDER_VERTEX having CODE_TYPE='END'.
  2. The open path that defines a geographical border, as described using the related GEO_BORDER_VERTEXes, cannot intersect itself.
  3. All related GEO_BORDER_VERTEX should have the same value in CODE_DATUM..
Attributes
TXT_NAME [Name] mandatory
The name of the common border. If the two countries (States) have more than one common border, each one will have a different name.
For example, France-Germany, France-Switzerland, Croatia-Serbia-north, Croatia-Serbia-south, etc..
Domain: TXT_NAME
CODE_TYPE [Type] mandatory
A code indicating the type of geographical border. The most common situation is the border between two countries.
Domain: CODE_TYPE_GEO_BDR
TXT_RMK [Remark] optional
Domain: TXT_RMK
GEO_BORDER_VERTEX [Vertex of physical or political border]
An entity which describes a geographical position used as vertex in the layout of a geographical border.
Attributes
NO_SEQ [Sequence number] mandatory
A number indicating the sequence of occurrences of the GEO_BORDER_VERTEXes making up the GEO_BORDER.
Domain: NO_SEQ
CODE_TYPE [Type] mandatory
A code indicating the type of path between a vertex as part of a geographical border and the next one on the same border.
Domain: CODE_TYPE_BORDER_VERTEX
GEO_LAT [Latitude] mandatory
The latitude of the vertex.
Domain: GEO_LAT
GEO_LONG [Longitude] mandatory
The longitude of the vertex.
Domain: GEO_LONG
CODE_DATUM [Datum] mandatory
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
Rules:
  1. All geographical coordinates should be expressed in the WGS 84 system.
Domain: CODE_DATUM
VAL_GEO_ACCURACY [Geographical accuracy] optional
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
Rules:
  1. If VAL_GEO_ACCURACY is specified, than UOM_GEO_ACCURACY is mandatory.
Domain: VAL_DIST_HORZ
UOM_GEO_ACCURACY [Unit of measurement [geographical accuracy]] optional
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
Domain: UOM_DIST_HORZ
VAL_CRC [Cyclic redundancy check] optional
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
Notes:
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
Domain: VAL_HEX
TXT_RMK [Remark] optional
Domain: TXT_RMK
HOLDING_PROCEDURE [Holding procedure]
(ICAO) A predetermined manoeuvre which keeps an aircraft within a specified airspace while awaiting further clearance.
Attributes
CODE_TYPE [Type] mandatory
A code indicating the type of holding procedure.
E.g. en-route holding, terminal area holding.
Domain: CODE_TYPE_HOLD_PROC
TXT_DESCR [Description] optional
A textual description of the holding procedure.
Domain: TXT_DESCR
TXT_RMK [Remark] optional
Domain: TXT_RMK
IAP [Instrument approach procedure [IAP]]
(ICAO) A series of predetermined manoeuvres by reference to flight instruments with specified protection from obstacles from the initial approach fix, or where applicable, from the beginning of a defined arrival route to a point from which a landing can be completed and thereafter, if a landing is not completed, to a position at which holding or en-route obstacle clearance criteria apply.
Attributes
TXT_DESIG [Designator] mandatory
The full textual designator of the IAP.
For example, HAPPY1A - a landing procedure that starts at point HAPPY.
Notes:
The ICAO rules stated in Annex 11, Appendix 3, for the coded designator of a MLS/RNAV procedure are supported as follows:
- the type of the approach (MLS) is available in the mandatory attribute CODE_TYPE_RTE ('M' for MLS/RNAV);
- the basic indicator, validity indicator and route indicator are combined in the TXT_DESIG;
- the runway designator is available through the mandatory relationship to RWY_DIRECTION or FATO_DIRECTION.
Domain: TXT_DESIG_IAP
CODE_CAT_ACFT [Aircraft category] optional
A code indicating the class of aircraft based on 1.3 times stall speed in landing configuration at maximum certified landing mass.
Domain: CODE_CAT_ACFT
CODE_RNP [Required navigation performance] optional
A code indicating the navigation performance (RNP) required for an aircraft to fly a SID, STAR or Instrument Approach Procedure.
Domain: CODE_RNP
TXT_DESCR_COM_FAIL [Communication failure description] optional
A textual description of the 'communications failure' procedure.
Domain: TXT_DESCR
CODE_TRANS_ID [Transition identifier] optional
A code used to identify a branch of an IAP, as described in ARINC 424, 5.11
Domain: CODE_ID_DESIG_PT
CODE_TYPE_RTE [Type] mandatory
A code indicating the type of Instrument Approach Procedure.
E.g. VOR/DME Approach, Instrument Landing System (ILS), NDB Approach, GPS Approach, etc..
Domain: CODE_TYPE_IAP
TXT_DESCR_MISS [Missed approach procedure description] optional
A textual description of the missed approach procedure.
Domain: TXT_DESCR
TXT_RMK [Remark] optional
Domain: TXT_RMK
IAP_USAGE [IAP condition of usage]
The usage of a particular IAP with regard to timetable and whether or not it is subject to the Flexible Use of Airspace (FUA) concept.
Attributes
CODE_RTE_AVBL [IAP usage within the flexible use of airspace] mandatory
A code indicating the usage of the IAP within the Flexible Use of Airspace context.
Domain: CODE_RTE_AVBL
TXT_RMK [Remark] optional
Domain: TXT_RMK
ILS [Instrument landing system [ILS]]
(ICAO) A radio aid to navigation intended to facilitate aircraft in landing by providing lateral and vertical guidance including indications of distance from the optimum point of landing.
Attributes
CODE_CAT [Category] mandatory
A code indicating the category of the ILS System
Notes:
1) If the category is unknown, the ILS is assumed to have the lowest possible category ('NOCAT').
Rules:
  1. An ILS without ILS_GP must have CODE_CAT='NOCAT'.
Domain: CODE_CAT_LDG_AID
TXT_RMK [Remark] optional
Domain: TXT_RMK
ILS_GP [ILS Glide Path]
A component of an ILS consisting of a UHF transmitter radiating signals and providing a straight line descent path in the vertical plane containing the center line of the runway served by the ILS, and thereby furnishing descent information down to the lowest authorized decision height or to the surface of a runway, depending on the Facility Performance Category of the ILS.
Rules:
  1. The position given by GEO_LAT, GEO_LONG must be plausibly close (less than 1 KM) to that of the threshold of the related (through ILS) RWY_DIRECTION.
Attributes
VAL_FREQ [Frequency] mandatory
The frequency value of the ILS glide path indicator.
Notes:
The relationship which exists between LLZ frequency and GP frequency is constant. When a particular LLZ frequency is used, the GP frequency must be the corresponding one (Annex 10, Vol. 1, 3.1.6.).
Rules:
  1. The value of the VAL_FREQ has to lie between 328.6 MHz and 335.4 MHz. (see ICAO Annex 10, Vol. 1, section 3.1.5.2).
Domain: VAL_FREQ
UOM_FREQ [Unit of measurement [frequency]] mandatory
The unit of measurement of the ILS glide path indicator frequency.
Domain: UOM_FREQ
CODE_EM [Emission] optional
A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference.
For example, A3E, NONA2a, G1D, etc..
Domain: CODE_EM_RDO
VAL_SLOPE [Slope angle] optional
The angle of the glide path.
Rules:
  1. The value of the VAL_SLOPE has to lie between 1 and 5 degrees.
Domain: VAL_ANGLE
VAL_RDH [Reference datum height] optional
The value of the ILS Reference Datum Height (ILS RDH).
Rules:
  1. The value of the VAL_RDH has to lie between 10 and 25 metres (see ICAO Annex 10, Vol. 1, section 3.1.5.1.4).
  2. If VAL_RDH is specified, then UOM_RDH is mandatory.
Domain: VAL_DIST_VER
UOM_RDH [Unit of measurement [reference datum height]] optional
The unit of measurement of the Reference Datum Height (RDH).
Domain: UOM_ELEV
GEO_LAT [Latitude] mandatory
The latitude of the position of the ILS glide path station.
Domain: GEO_LAT
GEO_LONG [Longitude] mandatory
The longitude of the position of the ILS glide path station.
Domain: GEO_LONG
CODE_DATUM [Datum] mandatory
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
Rules:
  1. All geographical coordinates should be expressed in the WGS 84 system.
Domain: CODE_DATUM
VAL_GEO_ACCURACY [Geographical accuracy] optional
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
Rules:
  1. If VAL_GEO_ACCURACY is specified, then UOM_GEO_ACCURACY is mandatory.
Domain: VAL_DIST_HORZ
UOM_GEO_ACCURACY [Unit of measurement [geographical accuracy]] optional
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
Domain: UOM_DIST_HORZ
VAL_ELEV [Elevation] optional
The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
Rules:
  1. If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
Domain: VAL_DIST_VER
VAL_ELEV_ACCURACY [Elevation accuracy] optional
The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
Rules:
  1. VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
Domain: VAL_DIST_VER
VAL_GEOID_UNDULATION [Geoid undulation] optional
A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
Rules:
  1. VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
Domain: VAL_DIST_VER
UOM_DIST_VER [Unit of measurement [vertical distance]] optional
The unit of measurement for vertical distances: elevation, geoidal undulation.
Domain: UOM_ELEV
VAL_CRC [Cyclic redundancy check] optional
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
Notes:
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
Domain: VAL_HEX
TXT_VER_DATUM [Vertical Datum] optional
Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example, "AMSTERDAM GAUGE", "NEWLYN" etc.).
Domain: TXT_DESCR
TXT_RMK [Remark] optional
Domain: TXT_RMK