A.show a fixed red light if lighted
B.show a Morse (A) white light
C.be square in shape
D.have an even number if numbered
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A.must be displayed when day signals are being used
B.must be displayed when moored to a pier
C.may be extinguished at night on open waters when no other vessels are in the area
D.may be displayed during daylight
A.green lights
B.red lights
C.yellow lights
D.white lights
A.mile board
B.dredging mark
C.passing daymark
D.crossing daymark
A.drilling
B.soil reactions
C.temperature
D.current
A.the starboard side of the channel
B.the centerline of the channel
C.an obstruction where the preferred channel is to starboard
D.special purpose areas
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A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
A towing light is a yellow light having the same characteristics as a(n)（）
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.
The duration of a prolonged blast of the whistle is（）.
Lighted information markers show（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
An occulting light is one in which（）.
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?（）.