The present invention provides an aircraft navigational system including a graphical
user interface that is capable of displaying navigational information in a split-screen
format. The split-screen format includes displaying multiple graphical user panels,
each depicting different traffic information. For example, one of the panels displays
a plurality of air traffic symbols corresponding to airborne obstacles and another
of the panels simultaneously displays ground traffic symbols representing ground
obstacles. The obstacles can include other aircraft in the air and on runways as
the pilot's aircraft approaches for a landing. The navigational system also is
capable of switching between a single graphical user panel and multiple panels
in response to a triggering event, such as a change in the course of the aircraft.