On Thursday, January 21, 2016 at 2:20:33 PM UTC-5, Dan Marotta wrote:
... I'm assuming the 421 was
on an IFR flight plan and therefore had to maintain his assigned
heading.* Of course, he could have asked for a vector to avoid
traffic.*

IRRC ATC is not tasked to maintain IFR to VFR separation (?) (only IFR to IFR). So according to protocol, was ATC waiting for 421 to request vector to avoid traffic?

(I really have no idea what I'm talking about, but I'd like to understand this scenario.)