Patent ID: 7039506

Claim:
A system for defining a line of approach, comprising: light sources arranged in an array; means coupled to said light sources for defining a primary field-of-view (FOV) from which all of said light sources are adapted to be visible to a remotely-located viewer positioned therein, wherein less than all of said light sources are adapted to be visible to the viewer when the viewer is positioned outside of said primary FOV, said means further dividing said light sources into a plurality of sections with each of said plurality of sections having a portion of said light sources associated therewith; and a controller coupled to said light sources for controlling operation thereof in accordance with cyclical on/off sequences, each of said cyclical on/off sequences being (i) associated with a corresponding one of said plurality of sections, (ii) identical for said portion of said light sources associated with said corresponding one of said plurality of sections, and (iii) unique for each of said plurality of sections, wherein a primary waveform of light energy is defined by said cyclical on/off sequences associated with said plurality of sections and is visible to the viewer from within said primary FOV, and wherein a plurality of secondary waveforms of light energy are defined by said cyclical on/off sequences with a unique one of said plurality of said secondary waveforms being visible to the viewer based on the viewer's position outside of said primary FOV.