TCAS is like radar and can detect aircraft that do not have operating transponders.

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Multiple Choice

TCAS is like radar and can detect aircraft that do not have operating transponders.

Explanation:
TCAS relies on interrogations and replies from other aircraft’s transponders (the secondary surveillance system) to determine where traffic is and how high it is. If an aircraft does not have an operating transponder, there is no reply to TCAS queries, so TCAS cannot detect it. Primary radar reflections, which are used by traditional ground radar, are not used by TCAS. So the statement is false because TCAS cannot detect aircraft that lack working transponders.

TCAS relies on interrogations and replies from other aircraft’s transponders (the secondary surveillance system) to determine where traffic is and how high it is. If an aircraft does not have an operating transponder, there is no reply to TCAS queries, so TCAS cannot detect it. Primary radar reflections, which are used by traditional ground radar, are not used by TCAS. So the statement is false because TCAS cannot detect aircraft that lack working transponders.

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