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
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The radiotelephone required by the Vessel Bridge-to-Bridge Radiotelephone Act is for the exclusive use of （）.
Place names used should be those （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
When the Pilot is embarked he or she （）.
The step of a pilot ladder which prevents the ladder from twisting is the （）.
The characteristic of a lighted cardinal mark may be （）.
When the movement of engine is no longer required the pilot usually gives the order like this（） .
Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
If the officer on watch is in any doubt as to the pilot’s actions，or intentions，he should （）.
Is the pilot boat （） station