NDB/ILS/DME approach - what's the difference?
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<font face="Verdana, Arial, Helvetica" size="2">OK, call me stupid, but I'm confused. What's the difference between an NDB/ILS /DME approach and the ordinary bog-standard ILS/DME?
An example is the one into Sumburgh.</font>
An example is the one into Sumburgh.</font>
<font face="Verdana, Arial, Helvetica" size="2">Can you give an example?</font>
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It's entitled "NDB to ILS/DME" in the Aerads. However I can find no material difference between that and examples of "ILS/DME" with an NDB as the IAF.
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I'm not sure it does make sense, paraman!
The Sumburgh approach, labelled 'NDB to ILS/DME Rwy 27' uses the SBH NDB as an IAF and has a teardrop pattern to the localiser. It has optional DME arcs for 'direct arrivals'.
Cambridge has an 'ILS/DME Rwy 23' approach which uses the CAM NDB as an IAF and has a teardrop pattern to the localiser. It has optional DME arcs for 'direct arrivals'.
I can't detect a material difference in the nature of the procedures, yet one has a 'NDB to' in the title, and the other does not.
The Sumburgh approach, labelled 'NDB to ILS/DME Rwy 27' uses the SBH NDB as an IAF and has a teardrop pattern to the localiser. It has optional DME arcs for 'direct arrivals'.
Cambridge has an 'ILS/DME Rwy 23' approach which uses the CAM NDB as an IAF and has a teardrop pattern to the localiser. It has optional DME arcs for 'direct arrivals'.
I can't detect a material difference in the nature of the procedures, yet one has a 'NDB to' in the title, and the other does not.
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Australia's 'Departure & Approach Procedures' ie Oz equivalent to UK Aerad & USA NOAS approach charts: If a navigation aid is used in the title then it is a required aid for the approach.
Can't remember if that applies to the Oz edition of Jepps or to Aerads, NOAS or local Jepp publications.
Can't remember if that applies to the Oz edition of Jepps or to Aerads, NOAS or local Jepp publications.