Darker ILS "beam"

John Collins said:
Wally,

Do you have any idea why with a PAPI, the OCS is 4 statute miles and not measured from the threshold, but a point 300 feet in front of the PAPI location. This makes the protected area just under 3.4 NM from the threshold. OTH, a VASI is 4 NM from the threshold or close enough for government work.
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Supposedly, PAPI was changed to 4 n.m. sometime ago. At least that is what a mutual friend of ours in procedure development tells me.
 
John Collins said:
I asked AeroNav. They decided the darker color was an error and will correct it. I doubt it is a high priority, but you might want to check again in January of 2014.
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Good to know.
Thanks for going so far out of your way.
 
And I was thinking it was just a cynical attempt to start a long, mud throwing thread on the blue board. :rofl:
 
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