单项选择题
A sailing vessel shall not impede the safe passage of a（）．
A.power-driven vessel following a traffic lane
B.pilot vessel enroute to a pilot station
C.law enforcement vessel
D.All of the above
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单项选择题
（）is not a type of IALA maritime buoyage system.
A.special marks
B.isolated danger marks
C.cardinal marks
D.fore and aft marks -
单项选择题
When using the anchor to steady the bow while approaching a dock you must be aware of the fact that（）.
A.the vessel will tend to take a large sheer towards the side where the anchor is down
B.steering control is ineffective in trying to turn to the side opposite to that of the anchor being used
C.the anchor cable must never lead under the hull
D.using an offshore anchor decreases the chances of the anchor holding -
单项选择题
When underway and proceeding ahead，as the speed increases，the pivot point tends to（）.
A.move aft
B.move forward
C.move lower
D.remain stationary
