The ship is not very stable，please（）when making a turn.

单项选择题The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.

A.SOS，ZZZ，XXX
B.SOS，UUU，SSS
C.SOS，XXX，TTT
D.SOS，TTT，UUU

单项选择题The most likely time for oil pollution while bunkering is when（）.

A.final topping off is occurring
B.first starting to receive fuel
C.hoses are being blown down
D.hoses are disconnected and being capped

单项选择题Smoking in bed on a ship is prohibited（）.

A.at all times
B.during evening hours
C.unless another person is present
D.during drilling operations

单项选择题Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.

A.shall
B.should
C.may
D.would

单项选择题Proper use shall be made（）radar equipment if fitted and operational.

A.of
B.to
C.on
D.with