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Comment Re:So they're just using contrast? (Score 1) 485

Its a 2D version if TCAS, where the vehicles have the option of coming to a complete halt if they face an impossible situation. TCAS uses communication between aircraft, so that they can negotiate a solution. So if you have two aircraft approaching head on one will tell its crew to pull up and the other to descend.

In your scenario communication between vehicles would definitely be required.

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