单项选择题

At sea，we can use（）to fix the ship’s position.

A.VHF
B.Steering Gear
C.Rudder Indicator
D.Loran

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单项选择题

Assumption shall（）on the basis of scanty information especially scanty radar information.

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

单项选择题

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