Sorry all, I didn't mean to sound harsh, but I guess it came out that way. Again sorry!
Originally Posted by sandokan
When I said vectoring, I meant vectoring by a terminal controller, not by center, who, yes, at times, vector aircraft off their preset RNAV STAR procedures. At 100 nm out a center controller can’t accurately determine which runway(s) will be in use by the time that aircraft gets inside terminal airspace which is normally =<40nm. They're usually vectoring aircraft from one of perhaps several STARS to another as example, or maintaining separation during heavy traffic hours, as you suggested, in the afternoon on the east coast.
RC gives the aircraft pilot an opportunity to fly a preprogrammed STAR, which brings them into terminal airspace.
In the default ATC, if you have a STAR programmed into the FMC, it's useless after 70nm out, and not within terminal airspace of the destination airport unless you choose not to contact the controller who you were handed over to at that distance.
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