"Ben Jackson" wrote in message
...

I've always wondered what the rules were. I've had PDX give me altitude
restrictions when I'm talking to them above their airspace. One day on
the way to Mt St Helens I recall being outside the lateral AND vertical
bounds of their airspace when I got an "at or below" for some crossing
traffic.

Since that's not as annoying as a vector I've never had cause to challenge
them. And they've been nice to me while inside their airspace, too.


What do you consider to be "their airspace"?



When I looked all I found was "obey ATC instructions". That's sort of
ambiguous when you are in a situation where you're not required to talk
to ATC at all, but happen to be...


Doesn't anyone read the AIM anymore?

http://www.faa.gov/atpubs/AIM/Chap3/aim0302.html#3-2-4