reframing the question to be easier to understand
I should re-phrase the question like this:
the DHL is flying absolutely to the EAST
the FEX is flying absolutely to the WEST
they are at the same altitude,
horizontal separation is 1.1nm
any chance the TCAS will alert??
If no, Logic 1 wins.
If yes, Logic 2 wins, if relative bearing is not used in the collision avoidance calculation.
right?