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單項(xiàng)選擇題

A vessel sighting a northern right whale dead ahead should（）.

A.maintain course and speed
B.alter course to give a wide clearance
C.report the whale's position to the Canadian Coast Guard
D.All of the above

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單項(xiàng)選擇題

A vessel showing a rigid replica of the International Code flag “A” is engaged in（）.

A.diving operations
B.dredging
C.fishing
D.mineclearance operations

單項(xiàng)選擇題

A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.

A.engaged in underwater construction
B.under sail and power
C.a pilot vessel
D.trawling

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