Sam Spade wrote:
Ross wrote:

I have a question regarding the rings shown on some charts and not
others. They are a dashed ring and are labeled "FEEDER FACILITIES"
and/or "ENROUTE FACILITIES". The may not be on all charts nor both on
the same chart. For example http://naco.faa.gov/d-tpp/0801/06000LD15.PDF.
I tried the Google route and that didn't work. I thought some of the
ATC folks could help me find out their meaning.

Ross
KSWI


A more complete answer is: where a 10 mile ring is shown, the chart is
not to scale outside that ring. Where a 10 mile ring is not shown, the
chart is to scale throughout the plan view.

Example:

http://www.naco.faa.gov/d-tpp/0801/06941R18.PDF

So a circle will always show either a fix for the feeder facilities and
/ or a VOR, etc for enroute facilities and the circle will go though the
fix or VOR, etc? Just want to be sure I understand.