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1st Mar 2010, 11:25

#19 (permalink)

obnoxious

Join Date: Aug 2008

Location: england

Age: 80

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re QNH

QNH Nautical Height is Height, or level, above sea level, at mean tide (ASL) as in Hypsography using a levelling rod as in land surveying, or DGPS. It ia all in the Wiki

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