Also, traffic advisories, etc are based on a TIME to potential conflict
Is there not a spacial element in the mix too? What's in the Vol 2 certainly isn't wrong but it mightn't be the whole truth either. Not exactly everyday event but if an intruder crept up on you with a decreasing relative speed it may not trigger a TA until it's unacceptably close if based on time alone as a trigger. I was always under the impression it'll shout at you if something gets into either your "time" or "space" bubble, whichever happens first?