A.Skull and crossbones
B.Yellow and white
C.Red and white
D.White and black
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A.soft clay
B.hard mud
C.very soft mud
D.sand
A.immediately after restoring vital services
B.immediately
C.following control of flooding
D.following establishment of fire boundaries
A.prevailing westerlies
B.horse latitudes
C.trade winds
D.subpolar low pressure belts
A.Weather side
B.Leeward side
C.Upwind side
D.Crosswind side
A.When at anchor，the pilot vessel is only required to sound anchor signals
B.The identification signal must be sounded any time the pilot vessel is underway
C.The pilot vessel may only sound the identity signal when making way
D.All of the above
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Considering the general circulation of the atmosphere，the wind system between latitudes 30°N and 60°N is commonly called the（）.
Define the acronym MSI（）.
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
Denebola is found in what constellation?（）
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Deficient oxygen content inside a chain locker can be detected with（）.
Deck beams on a ship are generally spaced at equal intervals and run（）.
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.
Control of fire should be addressed（）.
Deneb is found in what constellation?（）