Importance

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Abstract

A navigational system includes a display device and logic that simultaneously presents a textual display of an original flight plan and a modified flight plan on the display device. The textual display includes a textlist of waypoints that are on the original flight plan and the modified flight plan and performance data for common waypoints that are on both the original flight plan and the modified flight plan, as well as for new waypoints that are added to the modified flight plan. The performance data for each common waypoint includes performance data for the waypoint on the original flight plan and for the waypoint on the modified flight plan. The system may further include an interface device that allows an operator to change the modified flight plan. The logic updates the textlist of waypoints on the textual display when the modified flight plan is changed and updates the performance data on the textual display for common waypoints when the modified flight plan is changed. The logic may also designate on the textual display waypoints to be removed, which correspond to waypoints that are on the original flight plan but not on the modified flight plan, and, when the modified flight plan is activated to become a new flight plan, the logic removes from the textual display the waypoints that are designated to be removed.

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First Claim