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單項(xiàng)選擇題

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

A.towing vessel is less than 50 meters
B.towing vessel is greater than 50 meters
C.tow is less than 200 meters
D.tow is greater than 200 meters

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單項(xiàng)選擇題

A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.

A.A black ball in the forepart of her vessel
B.A black double frustum of a cone
C.A basket where best seen
D.A black cone point upwards

單項(xiàng)選擇題

A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.

A.two balls in a vertical line
B.a diamond shape where it can best be seen
C.a ball on each end of the tow
D.no dayshape

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