A.red
B.red and white
C.green
D.green and white
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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
A.Triangular
B.Diamond
C.Circular
D.Octagonal
最新試題
A red triangular daymark marks（）.
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（）.
A triangular daymark would be colored（）.
During the day，a vessel with a tow over 200 meters in length will show（）.
A towing vessel 30 meters in length is pushing barges ahead. How many white masthead lights is the vessel REQUIRED to show at night?（）
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?（）.
A towing light，according to the Rules，is a（）.
Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）
The duration of a prolonged blast of the whistle is（）.