單項(xiàng)選擇題Assumption shall()on the basis of scanty information especially scanty radar information.

A.make
B.be made
C.not make
D.not be made


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1.單項(xiàng)選擇題As a vessel changes course to starboard,the compass card in a magnetic compass().

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

2.單項(xiàng)選擇題A system of reservoirs and connecting tubes in a gyro compass is called a().

A.spider element
B.mercury ballistic
C.gyrotron
D.rotor

3.單項(xiàng)選擇題A single vertical magnet placed underneath the compass in the binnacle is used to compensate for().

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

4.單項(xiàng)選擇題A compass card without north-seeking capability that is used for relative bearings is a(n)().

A.bearing circle
B.pelorus
C.bearing bar
D.alidade

5.單項(xiàng)選擇題()is on the panel of DF.

A.RINGS INT
B.SWEEP INT
C.REPEATER
D.GONIOMETER