Display system and method for indicating a time-based requirement

A display system configured to provide a display to a flight crew of an aircraft comprising:

• an image display device;
• a data storage device;
• a flight management system;
• and
• a processing unit in operable electronic communication with the image display device, the data storage device, and the flight management system, wherein the processing unit comprises a computer processor that is configured to:
• receive a time-based requirement to a point of interest associated with operation of the aircraft;
• provide via the image display device a flight display including a graphically depicted time tape, wherein the time tape comprises a time scale;
• graphically depict within the time tape the point of interest using a first symbology;
• graphically depict within the time tape the time-based requirement using a second symbology, different than the first symbology;
• query the flight management system to obtain therefrom operational parameter data of the aircraft,
• determine an ability of the aircraft to achieve the time-based requirement based upon the operational parameter data;
• and
• in a first mode of operation to graphically depict within the time tape the ability of the aircraft to achieve the time-based requirement using a third symbology, different than the first symbology and second symbology;
• and
• in a second mode of operation to graphically depict within the time tape an indicator of progress of the aircraft to the time-based requirement using the third symbology, wherein the mode of operation is selected by the processing unit based upon the time-based requirement.