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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 is not necessary to copy it for the individual navaid equipment(s) (e.g. in case of 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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| Are these rules ok (see also below), or shall the availability, if it is the same, always be copied to all navaid equipments the navaid is composed of? If the working hours of the navaid equipment is different, shall also the availability of the navaid be coded with 'PARTIAL' and no timesheet? |
The NavaidOperationalStatus class carries two attributes:
The signalType attribute indicates 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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| title | Open question signalType |
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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 |
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| 'CONDITIONAL' | 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, 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].
Coding Rules for Hours of Operation for Navaid
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Coding Examples
See also topic Navaid [NAV].
Coding examples can also be found in the DONLON AIP data set file 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'] |