N101AA
Topic Author
Posts: 14
Joined: Sun Mar 12, 2000 12:35 am

Why Did These Runway Designations Change At Msp?

Sun Mar 12, 2000 12:40 am

The two parallel runways at MSP are 12L/30R and 12R/30L. There's a photo on here from 1994 that shows them as being 11L/29R and 11R/29L. Why the change?


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Photo © Mark Abbott


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Photo © Mark Abbott



N101AA
 
KALB
Posts: 564
Joined: Sat Mar 11, 2000 12:33 pm

RE: Why Did These Runway Designations Change At Msp?

Sun Mar 12, 2000 1:56 am

Orientation of runways are to the magnetic north pole rather than to the geographical north pole. The magnetic north pole is not stationary, therefore as it "moves", runway designations may need to be changed.
 
ywg777
Posts: 1240
Joined: Wed Oct 13, 1999 9:40 am

RE: Why Did These Runway Designations Change At Msp?

Sun Mar 12, 2000 2:35 am

The reason why is because the heading of the old 29L,29R,11L,11R was say 295 and 115 dirgrees. useally you round 5 up. so they did that to 300 dirgrees and 120 dirgrees.
YWG777

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