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- 13,766 Lance Eliakim Sotto
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- Celestial Navigation 360
- Android 앱: 지도/내비게이션 게시자: Sharpitor Elements
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- 포인트: 1 + 27 (3.4) 버전: 1.7 Celestial navigation exploits the principle that every measurement taken with a sextant (a 'sight') converts to a line of position on a chart, the intersections of two or more such ... ⥯
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