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Old 28th Dec 2006, 06:43
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Hold West
 
Join Date: May 2006
Location: USA
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I remember when the FAA instituted that procedure, first by NOTAM and then in the ATC regs.. it was the winter of 89-90, I think, and a huge intensely cold high pressure system settled over Alaska for weeks. Pressures were running 31.20" I think.
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