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Minimum Descent Altitude/Height (MDA/MDH)

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Whilst the ICAO Regulatory position on MDA/MDH is clearly given here and it states correctly that it is not permissible to fly below MDA/MDH in the absence of adequate visual reference, it does not also advise how it is mandated that this be achieved under JAR-OPS, which I think would be a useful addition. The JAR-OPS requirement is that the actual minimum for an NPA for large aircraft is calculated by adding a stated increment - from my own experience 30ft for narrow bodies - onto the published MDA/MDH. It is this DA/DH that must then be adhered to, with the corresponding approach callouts such as '500 above' and '100 above' made based upon it.--John.Milner 23:49, 16 January 2008 (CET)

Editorial Coment.

Good point. Article revised.--Ian.Wigmore 12:26, 12 February 2008 (CET)