A buoy marking a wreck will show a(n)（）.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
In the case of the leading marks，the master may（）to show these in the bill of lading if the goods or their containers are not clearly marked in such a manner as should ordinarily remain legible until the end of the voyage.
A towing light is a yellow light having the same characteristics as a(n)（）
At 1810，a red buoy bears 010° relative. This buoy marks（）.
At 1810，you sight a buoy on your starboard side labeled “19”. This buoy marks（）.
As you approach mile 427.6 AHP，you see on the right side a white buoy with orange bands and diamond. This buoy marks（）.
You are sailing south on the Intracoastal Waterway（ICW）when you sight a green can buoy with a yellow square painted on it.Which of the following is TRUE（）.
A buoy with a composite group-flashing light indicates a(n)（）.
When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.
A spherical buoy may be（）.
The characteristic of a lighted cardinal mark may be （）.
You determine your vessel’s position by taking a range and bearing to a buoy.Your position will be plotted as a（n）（）.
A(n) （） is a mechanical attack on the metal surface which may be due to a disturbance in the flow of the water over the blade of the propeller.
Two navigational hazards are located near to each other，but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by（）.
An orange and white buoy marking a danger area will have what symbol on it?（）
A green buoy has a yellow triangle on it. This is a(n)（）.
A preferred-channel buoy may be（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Buoys which mark isolated dangers are painted with alternating（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
This is a(n) ________ time in his life, so he may think twice before taking any action.
