單項選擇題

An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）

A.Three lights in a vertical line，the highest and lowest red and the middle white，and anchor lights
B.Three lights in a vertical line，the highest and lowest red and the middle white，ONLY
C.Anchor lights ONLY
D.Anchor lights and sidelights ONLY

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單項選擇題

An all-round flashing yellow light may be exhibited by a(n)（）.

A.vessel laying cable
B.vessel towing a submerged object
C.vessel not under command
D.air cushion vessel

單項選擇題

An airplane should NOT send which signal in reply to a surface craft?（）

A.Opening and closing the throttle
B.Rocking the wings
C.Flashing the navigational lights off and on
D.Flashing Morse T