A.immediately after restoring vital services
B.immediately
C.following control of flooding
D.following establishment of fire boundaries
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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
A.Greenwich celestial meridian
B.hour circle of the body
C.local celestial meridian
D.vertical circle of the body
A.Ballast Control Operator
B.Barge Supervisor
C.Master or Offshore Installation Manager
D.operators representative
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Deficient oxygen content inside a chain locker can be detected with（）.
Chart legends printed in capital letters show that the associated landmark is（）.
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.
Dacron sails，when not in use，may be damaged if（）.
Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
Changing rescuers while carrying out artificial respiration should be done（）.
Coiling new rope against the lay，bringing the lower end up through the center of the coil，then coiling with the lay，in order to remove the kinks，is known as（）.
Control of fire should be addressed（）.
Deck beams on a ship are generally spaced at equal intervals and run（）.