A.pressure changes in the air mass
B.movement of the air mass
C.the heterogeneous nature of the air mass
D.upper level atmospheric changes
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A.which
B.where
C.what
D.who
A.specified by international authorities
B.specified by national authorities
C.on standard map
D.on the chart or Sailing Directions in use
A.equipped
B.rigged
C.put on
D.put off
A.convey
B.convoy
C.escort
D.conform
A.the vessel
B.shall not vessel
C.the vessel should
D.should vessel
A.light，variable winds with little or no humidity
B.strong，gusty winds that blow from the same general direction all year
C.steady winds that reverse direction semiannually
D.strong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
A.straight
B.direct
C.forward
D.on
A.to allow port Authorities to board
B.allowing port Authorities to board
C.to allow port Authorities boarding
D.allowing port Authorities to be boarded
A.high
B.highly
C.heigh
D.height
A.in
B.at
C.with
D.on
最新试题
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Place names used should be those （）.
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Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
The pilot said he （）our vessel directly to the berth．
The single letter G，sent by an icebreaker to an assisted vessel，means （）.
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Please wireless to let me know （） I am to anchor or to meet pilot．