the controller tells you and stay silent during the approach
That is after the controller tells you "From now on do not acknowledge any instructions".
Basically it is the same as flying the ILS raw data, but the final controller is figuring out the headings and vertical corrections for you.
As long as you fly the headings correctly, and you don't have a controller under training
it works very nicely .
In the Air Force, where this is a common type of approach, a good controller will tell you exactly when you are passing the threshold. You would have been visual with the runway 150 feet before offcourse
