On Feb 17, 3:15 pm, "Matt" wrote:
"Steven P. McNicoll" wrote

Perfectly acceptable in Class B airspace. If you were never told to
proceed to the field or resume your own navigation or anything else like
that you just hold the last assigned heading. "Descend at your
discretion" would cancel any previously assigned altitude, but not the
heading.

That is my understanding as well. But the last instruction I received from
the approach controller before being handed to the tower was to descend at
my discretion. I decided to turn onto final without ever being specifically
told to do so by the approach controller or the tower controller.

If the last instruction did not include a heading, you are still bound
by the heading that was assigned to you on a previous instruction.