单项选择题

A position obtained by applying only your vessel’s course and speed to a known position is a （）.

A.dead-reckoning position
B.fix
C.probable position
D.running fix

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单项选择题

A.a line connecting two charted objects
B.a line on some point of which the vessel may be presumed to be located
C.the position of your vessel
D.not used in a running fix

单项选择题

A line connecting all possible positions of your vessel at any given time is a（）.

A.longitude line
B.latitude line
C.line of position
D.fix

单项选择题

A large navigational buoy (LNB) is painted（）.

A.red
B.yellow
C.with red and white vertical stripes
D.with a distinct color and pattern unique to each buoy