单项选择题
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
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相关考题
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单项选择题
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 -
单项选择题
A tug is towing three manned barges in line in fog. The first vessel of the tow should sound （）.
A.no fog signal
B.one short blast
C.one prolonged and three short blasts
D.one prolonged，one short，and one prolonged blast -
单项选择题
A triangular daymark would be colored（）.
A.red
B.red and white
C.green
D.green and white
