| 摘要 |
There is disclosed apparatus for instrument landing of aircraft presenting to the pilot, from glide path and range signals originating on the ground and from aircraft-originated signals on altitude, airspeed and aircraft attitude, a three-dimensional representation of a roadway in the sky down which the aircraft is to be navigated to a touchdown point on an airport runway, together with indications of the departure of the aircraft from proper position and altitude with reference to that roadway, and departures from desired airspeed along it.
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