A.Greenwich celestial meridian
B.hour circle of the body
C.local celestial meridian
D.vertical circle of the body
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A.Ballast Control Operator
B.Barge Supervisor
C.Master or Offshore Installation Manager
D.operators representative
A.Selected Worldwide Marine Weather Broadcasts
B.your local newspaper
C.the Notice to Mariners
D.the daily weather map
A.stronger
B.thinner
C.more corrosion resistant
D.a lower grade steel
A.warmer，less dense，and less stable
B.cool，more dense，and drier
C.muggy and cloudy
D.extremely moist with high relative humidity
A.the Canadian Coast Guard
B.Ice Sarnia
C.the Ice Navigation Center
D.the icebreaker assigned to the area
最新試題
Deneb is found in what constellation?（）
Clouds form（）.
Changing rescuers while carrying out artificial respiration should be done（）.
Day-shapes must be displayed（）.
Chart legends printed in capital letters show that the associated landmark is（）.
Dacron sails，when not in use，may be damaged if（）.
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Compared to internal structural plating，the exterior hull plating on a ship is usually（）.
Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.