发现陆地,一岛的南部罗经方位东北距离5海里。
Made out the land, the southern part Of an island bearing per compass NE distance 5.
如天气好,每一班测取天体方位求出罗经差。
Take celestial azimuth and find compass error on each watch if the weather is fine.
如何让手机的方位罗经读数和陀螺仪数据吗?
How to get a phone's azimuth with compass readings and gyroscope readings?
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