航海英語號燈與號型單項選擇題每日一練(2019.01.24)

來源：考試資料網(wǎng)

1 A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）.

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2 By night，you sight the lights of a vessel engaged in underwater operations. If an obstruction exists on the port side of the vessel，it will be marked by（）.

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3 Which vessel，when anchored at night，is NOT required to show anchor lights?（）.

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4 A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the（）.

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5 A towing light is a yellow light having the same characteristics as a(n)（）

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