Introduction & PANS-AIM Reference
PANS-AIM requires some as part of the minimum AIP data set the hours of operation for radio navigation aids (for both enroute and terminal radio navigation and landing aids).
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It is possible to code the availability of a Navaid and also of a NavaidEquipment.
As a general rule, the availability of a NavaidEquipment should only be coded in case of a navaid is composed of more than one navaid equipment, whereas at least one of them has a different availability than the others. If for one navaid equipment the availbility is coded, the availability has to be coded for all other navaid equipments of that navaid. For the navaid itself no availability will be coded. E.g. for a VOR/DME, in case the DME and VOR have different working hours, the availability will be ecoded encoded for both navaid equipments separately, but not for the navaid).
In case of a navaid composed of one single navaid equipment or a navaid composed of more navaid equipments all having the same working hours, the availability will only be coded for the Navaid, it . It is not necessary to copy it for the individual navaid equipment(s) (e.g. in case of a an ILS, where all components (LOC, GP, Markers) have the same working hours, the availability will only be coded for the navaid).
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| title | Open question Navaid Working hours |
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The NavaidOperationalStatus class carries two attributes:
The signalType attribute indicated may be used to indicate the type of information transmitted by a navaid or other radio emission source (e.g. azimuth or distance) .
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| How shall this attribute be used? Does it make sense to define tham at all, A DME per see has a signattype Distance, etc. How can this be coded by using timesheet? |
The operationalStatus indicates the state of the navaid:
| Value | Description | ||
|---|---|---|---|
| 'OPERATIONAL' | Operating normally. | ||
| 'UNSERVICEABLE' | Not available. | ||
| 'ONTEST' | On test, do not use. | ||
| 'INTERRUPT' | Expect interruptions of the signal. | ||
| 'PARTIAL' | Operating with limited capabilities. For example, used when just the DME part of a VOR/DME is working. Info | title | Open Question: Wouldn |
| 't that be coded a availability of the individual navaid Equipment?CONDITIONALCONDITIONAL' | Operative subject to published limitations or conditions. | ||
| 'FALSE_INDICATION' | Giving false indication, do not use. | ||
| 'FALSE_POSSIBLE' | False indication possible, use with caution. | ||
| 'DISPLACED' | Displaced | ||
| 'IN_CONSTRUCTION' | In Construction | ||
| 'OTHER' | Other |
For the AIP data set the default value for the hours of operation for a navaid will be 'OPERATIONAL'. Most of the others status are only relevant for an application of the Digital NOTAM concept.
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| title | Open Question: not H24 |
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In addition, altough although not required by PANS-AIM for the minimum AIP data set, the NavaidEquipmentMonitoring class is used to define if the navaid equipment is monitored ('YES') or not ('NO'). Corresponding Timesheet may be used to define the corresponding time constraints.
For details of how to encode the Timesheet see topic Schedule [TSH]) Common coding patterns.
Coding
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Coding Examples
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Examples
See also topic Navaid [NAV].
Coding examples can also be found in the AIP Data Set - Specimen (DONLON):
| No. | Description | XPath Expression |
|---|---|---|
VOR-EX-01 DME-EX-01 | VOR/DME with hours of operation H24 | //aixm:VORTimeSlice [@gml:id ='VOR_BOR'] | //aixm:DMETimeSlice [@gml:id ='DME_BOR'] |
| NDB-EX-01 | NDB with unknown hours of operation | //aixm:NDBTimeSlice [@gml:id ='NDB DON'] |