单项选择题

A relative bearing is always measured from（）.

A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head

<上一题目录下一题>

热门试题

单项选择题

A.white light whose characteristic is Morse (A)
B.group-occulting white light
C.composite group-flashing (2 + 1) white light
D.composite group-flashing (2 + 1) red or green light

单项选择题

A preferred-channel buoy may be（）.

A.lettered
B.spherical
C.showing a white light
D.All of the above