| 21. | There is also a Celestial Navigation Course for instruction in navigating by the stars.
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| 22. | The term chronometer is also used to describe a marine chronometer used for celestial navigation.
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| 23. | It may involve water temperature, currents and celestial navigation.
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| 24. | The navigation devices also malfunctioned, but Perka's Navy training allowed him to use celestial navigation.
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| 25. | Fifty-eight selected navigational stars are given a special status in the field of celestial navigation.
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| 26. | In 1984, along with Geoffrey Lewis and David Campbell, Levin created the story-telling group Celestial Navigations.
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| 27. | However, with the advent of GPS, student navigators were no longer taught celestial navigation or LORAN.
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| 28. | For navigators near the equator celestial navigation is simplified since the whole celestial sphere is exposed.
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| 29. | Before the introduction of the compass, celestial navigation was the main method for navigation at sea.
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| 30. | "I teach them celestial navigation, " he says.
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