A.having engaged in fishing
B.engaging in fishing
C.engaged in fish
D.engaged in fishing
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A.including
B.inclusive of
C.except that
D.other than
A.only at night
B.only during restricted visibility
C.at night and during restricted visibility
D.at all times
A.only in fog
B.only between the hours of sunset and sunrise
C.only when entering and leaving port
D.at all times
A.one sidelight of a vessel ahead of you
B.one sidelight and a masthead light of a vessel ahead of you
C.one sidelight，a masthead light，and a range light of a vessel ahead of you
D.both sidelights of a vessel dead ahead of you
A.humidity
B.varying densities of water
C.vessel traffic
D.the jet stream
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In dense fog a vessel without operational radar may not be justified（）at all but should anchor if it is safe and practicable for her to do so.
A vessel engaged in mine clearance operations is called（）.
In a crossing situation，the stand-on vessel should normally（）.
A proper look-out must be kept（）.
As look-out，you spot an object 45°off your port bow. You should report the object as（）.
A vessel being towed astern shall show at night（）.
A vessel（）when underway shall so far as possible，keep out of the way of a vessel not under command.
A head-on situation at night is one in which you see（）.
A vessel being towed will show（）.
If a seaplane is not used as a means of transpiration on water but is capable of being used so，it shall（）.