When on the surface, the quartermasters may use a sextant to obtain navigation fixes as a backup to our modern day systems. 当在水面时，航海士官长们可以使用六分仪来获得航行定位以作为我们现代定位系统的备用资料。
Maria taught them to use the sextant, an instrument measuring the height of the sun from the horizon. 玛丽向他们传授使用六分仪的方法，这种仪器可以用来测算太阳距海面的高度。
