單項(xiàng)選擇題A survey (special purpose mark) buoy（）.

A.must be lighted
B.may have a flashing red light
C.may have a fixed white light
D.None of the above


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1.單項(xiàng)選擇題A gas-free certificate would usually be issued by a(n)（）.

A.CCS marine surveyor
B.certified marine chemist
C.port engineer
D.MSA marine inspector

4.單項(xiàng)選擇題（）is not a vessel restricted in her ability to maneuver．

A.A vessel engaged in laying，servicing or picking up a navigation mark，submarine cable or pipeline
B.A vessel engaged in dredging，surveying or underwater operations
C.A vessel engaged in replenishment or transferring persons，provisions or cargo while underway
D.A power driven vessel which because of her draught in relation to the available depth and width of navigation water is severely restricted in her ability to deviate from the course she is following

5.單項(xiàng)選擇題（）can be regarded as a vessel restricted in her ability to maneuver．

A.Any aircraft designed to maneuver on the water
B.A vessel engaged in dredging，surveying or underwater operations
C.A vessel under sail provided that propelling machinery is not used
D.A small vessel sailing at night