| 41. | Where national regulations specify a universal requirement for a magnetic compass these aircraft are equipped with same.
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| 42. | The declination of the commonly used magnetic compass in designating the qibla direction always troubled his mind.
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| 43. | The markings on a " liuren / shi " and the first magnetic compasses are virtually identical.
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| 44. | There is no external magnetic compass and the fuel tank is now installed before the pilots control area.
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| 45. | There was an automatic pilot function driven by either gyrocompass or magnetic compass as the input heading source.
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| 46. | A magnetic compass is a simple instrument when the compass is not moving and is on the earth.
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| 47. | Does a magnetic compass behave properly?
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| 48. | Most of the errors inherent in the heading indications of a magnetic compass are related to the compass'construction.
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| 49. | Of course, for many hikers, there is no substitute for a good topographical map and an old-fashioned magnetic compass.
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| 50. | In China, early versions of the magnetic compass were being developed and used in navigation between 1040 and 1117.
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