单项选择题
A.plug the vents B.plug the sounding pipes C.plug the scuppers D.close the lids on the vents
A position that is obtained by using two or more inters...
单项选择题A position that is obtained by using two or more intersecting lines of position taken at nearly the same time，is a(n) （）.
A.fix B.running fix C.estimated position D.dead-reckoning position
A position that is obtained by applying estimated curre...
单项选择题A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) （）.
A.estimated position B.dead reckoning position C.fix D.None of the above
A position obtained by crossing lines of position taken...
单项选择题A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) （）.
A.dead-reckoning position B.running fix C.estimated position D.fix
