A.prevailing westerlies
B.horse latitudes
C.trade winds
D.subpolar low pressure belts
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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
A.Selected Worldwide Marine Weather Broadcasts
B.your local newspaper
C.the Notice to Mariners
D.the daily weather map
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Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
Deneb is found in what constellation?（）
Day-shapes must be displayed（）.
Complete information on weather broadcasts throughout the world is contained in（）.
Compared to a low pressure system，generally the air in a high is（）.
Chart legends which indicate a conspicuous landmark are printed in（）.
Clean air standards referred to as “Grade D” apply to compressed air for use in（）.
Cumulonimbus clouds are formed by（）.
Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）
Dacron sails，when not in use，may be damaged if（）.