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Asked by: Ronnaphop
DA, MDA Instrument Rating
For every approach chart, what do MDA/DA based on?
Someone told me there were based on the obstrucles. But I'm not sure about it.
Airport design? Terrain? or another considerations?
Gary Moore on Aug 03, 2010
Well that’s a great question. Certainly obstacles play a role – but it’s more complicated than just that – things like nav-aid reception, terrain, traffic flows – all play a part. All the specifics are spelled out in a set of documents called TERP – you can check them out here – http://bit.ly/bCa45Q
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