A.One
B.Two
C.Three
D.Four
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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
A.the centerline of a navigable channel
B.the starboard side of a channel
C.a prominent object of navigational interest that has no lateral significance
D.area of a channel where passing another vessel is permitted
最新試題
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（）.
On entering from seaward，a starboard side daymark will（）.
A red triangular daymark marks（）.
A safe water daymark has what shape? （）
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.
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 vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.