Sextant can be used for exploration and navigation .六分仪可用于航海和勘探中。To navigate , they must fix their sextant on something concrete.要行动, 就必须要立足于某个坚实的事物上.Other early instruments included the sextant and the astrolabe.另外的早期仪器...
Sextant can be used for exploration and navigation .六分仪可用于航海和勘探中。To navigate , they must fix their sextant on something concrete.要行动, 就必须要立足于某个坚实的事物上.Other early instruments included the sextant and the astrolabe.另外的早期仪器...