It’s sometimes useful to explain a little about the distinction between Situational Awareness (SA) and Shared Situational Awareness, and the fact that it is an evolving thing that – by the time you get to shared SA -  can produce friction. 

It isn’t about everyone knowing what everyone else knows. It’s about a shared understanding of a situation relevant to achieving a defined and shared set of goals.  We do sometimes underplay the difficulties in establishing it and maintaining it.