A.large cumulonimbus (thunderclouds) building up
B.high cirrus clouds gradually changing to cirrostratus and then to altostratus
C.fog caused by the warm air passing over the cooler water
D.low dark clouds accompanied by intermittent rain
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A.very quick flashing
B.flashing
C.fixed
D.occulting
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
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
最新试题
When a pilot is on board to pilot the vessel the Letter （） must be hoisted．
Place names used should be those （）.
The pilot said he （）our vessel directly to the berth．
Please wireless to let me know （） I am to anchor or to meet pilot．
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
The first indications a mariner will have of the approach of a warm front will be （）.
Gangway （）with pilot ladder on my starboard side．
Monsoons are characterized by （）.
The pilot station （） close west of the end of the breakwater．
Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.