A.pumped overboard to calm the seas
B.drained to the lower hull to reduce free surfaces
C.filled to ensure that sufficient fuel oil is available during a lengthy emergency
D.partially drained to increase free surfaces in order to reduce motions

A.broaching
B.pitchpoling
C.rolling
D.yawing

A.The amount of take-up is limited by the length of the turnbuckle
B.At the grab (pear) link，the slack end of chain should be led back and secured to the chain above the link
C.The lashings should be inspected each day and any slack taken up
D.The turnbuckle should be secured with a stick or lock nuts

A.A pumping of the barometer up and down a few millibars
B.A sudden wind shift from southwest to northwest followed by steadily increasing winds
C.The normal swell pattern becoming confused，with the length of the swell increasing
D.An overcast sky with steadily increasing rain from nimbostratus clouds

A.in trays constructed of material that is resistant to the electrolyte
B.so as to prevent movement when the vessel pitches and rolls
C.in a well ventilated area
D.All of the above