單項(xiàng)選擇題

An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.

A.blue rotating light
B.intermittent flashing amber/yellow light
C.flashing white light
D.flashing sidelight

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An aneroid barometer on a boat should always be（）.

A.located in an air-conditioned area
B.mounted in the passenger compartment
C.protected by a collision bulkhead
D.permanently mounted

單項(xiàng)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