A.make
B.be made
C.not make
D.not be made
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A.remains aligned with compass north
B.also turns to starboard
C.first turns to starboard then counterclockwise to port
D.turns counterclockwise to port
A.spider element
B.mercury ballistic
C.gyrotron
D.rotor
A.the horizontal component of the permanent magnetism
B.deviation caused by the vessel's inclination from the vertical
C.induced magnetism in the horizontal soft iron
D.induced magnetism in the vertical soft iron
A.bearing circle
B.pelorus
C.bearing bar
D.alidade
A.RINGS INT
B.SWEEP INT
C.REPEATER
D.GONIOMETER
最新試題
Which statement concerning GPS is TRUE（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Automatic identification systems（AIS）are required to（）.
The loran lines drawn on navigation charts represent（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Would you please（）on the radar?
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Would you mind（）your DF?