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單項選擇題

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

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單項選擇題

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

單項選擇題

A fairly accurate estimation of a ship’s position can be calculated by a technique known as（）.

A.dead reckoning
B.Pilotage
C.great circle sailing
D.geographic navigation

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