A.very quick flashing
B.flashing
C.fixed
D.occulting
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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
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Is the pilot ladder all right at this （）
Pilot ladder is （） on port side．
From （）the mariner can understand the data of tide．
The pilot station （） close west of the end of the breakwater．
The pilot said he （）our vessel directly to the berth．
The transfer procedures for oil products are required to be posted （）.
When a tug is pulling on a hawser at right angles to the ship，and the pilot wants to come ahead or astern on the ship’s engine，care must be taken that the pilot（）.
The characteristic of a lighted cardinal mark may be （）.
There shall be two principal （） through the harbor for the passage of vessels of over 60 tons burden．
When the movement of engine is no longer required the pilot usually gives the order like this（） .