Domanda 175, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license

A simple intruding airplane proximity warning.
The intruder relative position and possibly an indication of a collision avoidance manoeuvre within the vertical plane only.
The intruder relative position and possibly an indication of a collision avoidance manoeuvre within the horizontal plane only.
The intruder relative position and possibly an indication of a collision avoidance manoeuvre within both the vertical and horizontal planes.