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- - Doc (https://www.pprune.org/professional-pilot-training-includes-ground-studies/89413-doc.html)

benhurr

8th May 2003 15:44

Doc

Does the DOC refer to ground distance from the station or DME from the station?

It is a while since I did Radio Nav and I can't find the answer in my notes. I have asked about and can't get the definitive answer.

Thanks

Ben

FlyingForFun

8th May 2003 16:22

I don't recall reading this in any of my ATPL notes. But since the DOC includes an altitude as well as a range (e.g. BNN is 60nm/25000 ft amsl) it would only really make sense if the range was a ground distance.

Also, since the DOC applies to both the VOR and the DME where they are co-located, and slant distance is not relevant to a VOR, this would tend to back up my theory.

FFF
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