True or False: Aircraft with a Mode C transponder are equipped with TCAS.

True or False: Aircraft with a Mode C transponder are equipped with TCAS.

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (B)

Mode C provides altitude-encoded replies to ATC radars, but TCAS is a separate system that monitors nearby traffic and issues avoidance advice by interrogating transponders. Just having a Mode C transponder does not guarantee that TCAS is installed or active on the aircraft. Some aircraft have Mode C for ATC purposes but no TCAS, while others include TCAS in addition to their transponder. TCAS relies on transponder replies from surrounding aircraft (which can be Mode A, C, or S) to assess collision risk, but the presence of Mode C alone does not ensure TCAS functionality.

Mode C provides altitude-encoded replies to ATC radars, but TCAS is a separate system that monitors nearby traffic and issues avoidance advice by interrogating transponders. Just having a Mode C transponder does not guarantee that TCAS is installed or active on the aircraft. Some aircraft have Mode C for ATC purposes but no TCAS, while others include TCAS in addition to their transponder. TCAS relies on transponder replies from surrounding aircraft (which can be Mode A, C, or S) to assess collision risk, but the presence of Mode C alone does not ensure TCAS functionality.