A.no fog signal
B.one short blast
C.one prolonged and three short blasts
D.one prolonged，one short，and one prolonged blast
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A.red
B.red and white
C.green
D.green and white
A.One
B.Two
C.Three
D.Four
A.white light
B.red light
C.yellow light
D.blue light
A.special flashing light
B.anchor light
C.sternlight
D.masthead light
A.only if she is towing astern
B.only if the tow exceeds 200 meters
C.at any time when towing
D.if the towing vessel is part of a composite unit
最新試題
Daymarks marking the starboard side of the channel when going towards the sea are（）.
According to the Rules，when should lights be displayed?（）.
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?（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.
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（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
If your vessel were proceeding down river (descending)，a green square marker with a green reflector border on the right bank would be a（）.
Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.
A vessel towing where the tow prevents her from changing course shall carry（）.