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单选题
A vessel conducting mine clearing operations will show（）.
A
three balls in a vertical line
B
two balls in a vertical line
C
one ball near the foremast and one ball at each fore yard
D
one diamond near the foremast head and one ball at each fore yard
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单选题At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.A
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单选题Which display indicates a vessel conducting mineclearance operations（）.A
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单选题Which vessel when anchored at night，would not be required to show anchor lights? （）A
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direct performance of deck or engine operations in a scheduled and fixed rotationB
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单选题A vessel showing a rigid replica of the International Code flag “A” is engaged in（）.A
diving operationsB
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mineclearance operations
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