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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The single letter G，sent by an icebreaker to an assisted vessel，means （）.
On no account （）proceed without pilot in this water area．
THE SPEED OF A VESSEL ADJUSTED TO THAT OF A PILOT BOAT AT WHICH THE PILOT CAN SAFELY EMBARK is （）.
The step of a pilot ladder which prevents the ladder from twisting is the （）.
Pilot ladder is （） on port side．
The characteristic of a lighted cardinal mark may be （）.
The pilot said he （）our vessel directly to the berth．
Which publication should you check for complete information on Puget Sound weather conditions? （）
There shall be two principal （） through the harbor for the passage of vessels of over 60 tons burden．
When the Pilot is embarked he or she （）.