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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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
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
A.no fog signal
B.one short blast
C.one prolonged and three short blasts
D.one prolonged，one short，and one prolonged blast
A.red
B.red and white
C.green
D.green and white
A.One
B.Two
C.Three
D.Four
最新試題
During the day，a vessel with a tow over 200 meters in length will show（）.
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（）.
As defined in the Rules，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 is a yellow light having the same characteristics as a(n)（）
If your vessel were proceeding down river (descending)，a green square marker with a green reflector border on the right bank would be a（）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.
A towing vessel 30 meters in length is pushing barges ahead. How many white masthead lights is the vessel REQUIRED to show at night?（）
Lighted information markers show（）.
Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.