| 摘要 |
Optical guidance system for the night landing of aircraft on a landing area along a determined approach path, which comprises two horizon reference luminous bars (1, 2) disposed in alignment with each other in a horizontal direction substantially perpendicular to the approach path, and two azimuth overshoot indicating lamps, respectively to the left (5) and to the right (6), located at the outer ends of the pair of horizon reference bars and provided with masks (8) in order that they can only be seen by the aircraft if the latter overshoots the approach path in azimuth to the left and to the right respectively.
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