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Old Jul 31, 2009 | 2:11 pm
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mahasamatman
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Originally Posted by allga
DCA runway 19 (it used to be 18--does anybody know why it changed?)
They redesignated the runways in 1999, probably due to magnetic drift (magnetic variation changes over time) or a new survey. 3/21 also became 4/22 at that time.
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