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Asked by: ben barron
PLEASE LOOK AT LOC RWY 36L NAPA (KAPC)
WHAT IS THE REASON FOR DYKEE INT. IT IS 13 NM FRON SAU VOR .
I SEE NO NEAD FOR IT.
on Sep 04, 2011
It’s not related to the approach – but presumably ATC sees a need for it. I’d take a wild guess – it’s a good place to clear people to to keep them clear of the SFO airspace.
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John D. Collins
on Sep 05, 2011
My guess is that it is a charting error. Often if it is a charting error, you can compare the AeroNav chart with the Jeppesen chart. Usually Jeppesen has better quality control. I don’t have a Jeppesen subscription that covers the West Coast or I would have checked it out. If somebody who has a Jeppesen subscription that covers the approach, it would be nice if they could compare the two charts.
It appears that the approach is being updated to “ILS or LOC 36L”. It is now at flight check status with a planned publication date of 2/9/2012.
on Sep 05, 2011
Often you will find that there are some ties between the enroute structure (the enroute chart) and the approach plate. I looked at the low altitude chart (Jeppesen version) and found that Dykee is displayed on the enroute chart, as is Scaggs Island VOR. My guess is that it is not an error by the TERPS guys who designed the plate but rather another way to create situational awareness and can be filed as an intersection on your flight plan prior to an initial approach fix if it is convenient for your route of flight. It will be interesting to see if it is included in the next version that John refers to. Let’s stay tuned and see.
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