A.continue
B.stop
C.commence
D.cease
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A.significant areas of damage or corrosion
B.pitting of plating and associated stiffening in decks
C.pitting of hull affecting seaworthiness or strength to take local loads
D.the condition of such items as ladder ways,guard-rails,pipe coverings
A.slip
B.sidewise force
C.rotational force
D.thrust
A.close
B.open
C.switch off
D.switch on
A.only after two hours in the water
B.only after four hours in the water
C.before entry into the water
D.upon entry into the water
A.when approved by the lockmaster
B.when locking downbound
C.at no time
D.during high water only
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