"Teacherjh" wrote in message


I think it's a thousand feet per inch. So if the altimeter setting
is 30.42, that's half an inch difference, or five hundred feet. Add
or subtract that from the given reading. (High to low, look out
below - so in this case you'd read 500 feet lower than you are, so
add) Should be good enough in an emergency.

Just what I want in an emergency: Another math test.

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John T
http://tknowlogy.com/tknoFlyer
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