As PM you should be telling the PF when to turn and what holding points should we expecting to see. With PF looking at his chart as well this is a good error check.
I disagree with your wording above, although the principles are correct in part!
As PM and/or PF, you should be 'asking' open questions as to what you expect to see/where you think you are, rather than 'telling' someone what to do. It is the 'telling' that results in confirmation bias which is what you want to avoid. What you want is independent confirmation of a shared mental model, imho.