5.a longitudinal reckoning by the navigator; made longitudinal measurements of the hull.
航进行经度计算;计算船身长度
6.He wasn’t good navigator, so it is necessary that the coastline remain in sight as he moved from one harbor to the next.
不擅航海,所以当从一码头驶到另一码头时,得一直沿海岸线航行。
7.A minimally invasive reflective array, tool navigator, and a registered burr were used for localization and deroofing of the lesion, followed by curettage and highspeed burring of the cavity.