| 11. | They had reached that point by relying solely on the Coutinho's sextant with its artificial horizon.
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| 12. | Gago Coutinho invented a type of sextant incorporating two spirit levels to provide an artificial horizon.
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| 13. | Roger Carnahan said he was having trouble with the artificial horizon, used to maintain level flight.
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| 14. | Others prefer to use a lit artificial horizon.
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| 15. | Wartime use of aircraft accelerated the development of new technologies . air speed and an artificial horizon.
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| 16. | If the valve wasn't working, it could have affected the operation of the artificial horizon, she said.
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| 17. | Tilt sensors and inclinometers generate an artificial horizon and measure angular tilt with respect to this horizon.
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| 18. | Randy Carnahan's training and periodic certification would teach him how to cope when an artificial horizon failed.
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| 19. | If the valve wasn't working, it could have affected the operation of the artificial horizon, Carmody said.
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| 20. | Other improvements include new warning indicates, a cockpit voice recorder, flight monitoring system, artificial horizon, and modernised electronics.
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