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
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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
A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
最新試題
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
Would you mind（）your DF?
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
Would you please（）on the radar?
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（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Which of the following statements is TRUE regarding crane operations（）.
The information received by AIS will be displayed on（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.