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 first indications a mariner will have of the approach of a warm front will be （）.
Gangway （）with pilot ladder on my starboard side．
Which publication should you check for complete information on Puget Sound weather conditions? （）
The characteristic of a lighted cardinal mark may be （）.
Is the pilot ladder all right at this （）
Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white? （）
Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
Pilot ladder is （） on port side．
If the officer on watch is in any doubt as to the pilot’s actions，or intentions，he should （）.
The pilot station （） close west of the end of the breakwater．