A system may include a display and a processor installed in an aircraft. The processor may be configured to: obtain air traffic data; generate a display image based at least on the air traffic data; and output the display image. The display may display the display image to a user. The display image may convey a range dimension and a horizontal dimension. The display image may depict at least one air traffic indicator. Each of the at least one air traffic indicator may be positioned respective to a corresponding range and horizontal location relative to the aircraft. Each of the at least one air traffic indicator may indicate at least one of: an amount of a vertical distance of air traffic above the aircraft, an amount of a vertical distance of air traffic below the aircraft, or that air traffic has an approximately equal altitude as the aircraft.