单选题In restricted visibility a towed vessel must sound a fog signal when it is（）.Athe last vessel in the towBthe last vessel in the tow and it is carrying a crewCmanned，regardless of its position in the towDNone of the above are correct
单选题
In restricted visibility a towed vessel must sound a fog signal when it is（）.
A
the last vessel in the tow
B
the last vessel in the tow and it is carrying a crew
C
manned，regardless of its position in the tow
D
None of the above are correct
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