| 21. | The plane had been fitted with a Sperry artificial horizon and a directional gyro since its previous flight.
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| 22. | These include the main displays and the backup artificial horizon, which was an analog display prior to this.
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| 23. | The aircraft was equipped with an artificial horizon for aeronautical use, a revolutionary own invention of Gago Coutinho.
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| 24. | The artificial horizon of the motte or mound is still well defined, as are many of the ditches.
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| 25. | At 7 : 20 p . m ., Roger Carnahan said he was having trouble with the artificial horizon.
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| 26. | The plane's pilot told air traffic controllers his artificial horizon, an instrument used to maintain level flight, was malfunctioning.
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| 27. | In this instrumentation the ILS glide path indication takes the form of a small triangle in the artificial horizon.
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| 28. | It was not possible to exclude the possibility that the crew may have doubted the correct operation of their artificial horizon.
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| 29. | There is even a vertical compass and a Clinometer with artificial horizon, to indicate rate of bank during high speed maneuvers.
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| 30. | The cockpit ILS gauges is not to be confused with the flight director, which also is located on the artificial horizon gauge.
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