Have looked thru the available tutes but can’t seem to find clarification on this. When using an approach/centre controller, often times there seems to be a battle with the Tower controller. I often receive messages to tune to the tower freq whilst still being directed to the ILS by the centre/approach. Not sure if the controllers can hear each other’s messages (I imagine that could be fairly chaotic) but I’ve found myself switching to the tower freq only to be immediately requested to switch freq back to the approach/centre.
Any idea? Perhaps there could be new instruction to advise one ATC that you are tuned to another freq? Thx!