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
单项选择题 （）is not a type of IALA maritime buoyage system.
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（）.
单项选择题 When underway and proceeding ahead，as the speed increases，the pivot point tends to（）.
