In SSR, altitude reporting provides precise vertical position data to maintain safe separation in airspace as which option?

• A. It allows automatic altitude assignments to aircraft.
• B. It increases the range of radar coverage.
• C. It provides precise vertical position data to maintain safe separation in airspace.
• D. It tracks flight crew medical data.

Answer: (C)

Altitude reporting in SSR is about giving the controller an accurate read of each aircraft's vertical position so safe separation can be maintained. The aircraft transponder replies to ground radar interrogations with encoded altitude information (Mode C or Mode S), providing precise altitude data that the controller uses alongside range and bearing to keep aircraft vertically separated according to standard minimums. This capability is essential for orderly traffic flow and preventing conflicts. The other options don’t fit because altitude reporting isn’t about automatically assigning altitudes, doesn’t extend radar range, and doesn’t involve tracking flight crew medical data.