单项选择题
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
A.GPS
B.GMDSS
C.AIS
D.Navtex
点击查看答案&解析
相关考题
-
单项选择题
By convention，the north seeking ends of a compass’ magnets are colored（）.
A.Black
B.Blue
C.Red
D.White -
单项选择题
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
A.flux
B.poles
C.magnets
D.azimuth -
单项选择题
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.
A.If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets
B.If the blue ends of the magnets are aft you should lower the fore-and-aft tray
C.If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets
D.If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnets
