Patent ID: 7403132

Claim:
A ground proximity warning system for an aircraft, comprising: at least one aircraft sensor system operable to acquire aircraft data; a ground proximity warning computer coupled to the at least one aircraft sensor system that is operable to process the aircraft data to generate ground proximity warning data corresponding to a sensed man-made obstruction; and an indicating system including at least one visual display device that is configured to display an image of a visual symbol corresponding to the sensed obstruction, wherein at least one of the computer and the visual display device is controllable to selectively alter an appearance of the visual symbol, wherein at least one of the computer and the visual display device is configured to allow one to selectably alter a range setting for the visual display device, further wherein at least one visual symbol within the set range is suppressed or an alternate visual symbol is displayed for a previously presented visual symbol when a predetermined range setting is selected within the set range.