单项选择题
A.visibility B.VHF C.visible D.compass
Navigators use navigational aids, such as（）（罗经）.A.sexta...
单项选择题Navigators use navigational aids, such as（）（罗经）.
A.sextant B.binoculars C.compass D.loran
（）（电罗经）can tell us true north.A.VHFB.RadarC.ChartD.Gyro...
单项选择题（）（电罗经）can tell us true north.
A.VHF B.Radar C.Chart D.Gyro-compass
Officers observe ships with a pair of （）（望远镜）.A.sextant...
单项选择题Officers observe ships with a pair of （）（望远镜）.
A.sextant B.binoculars C.compass D.radar
