單項選擇題A list man would expect to see any of the following light signals except （）.

A.two red lights
B.one green light
C.one white light
D.one amber light


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1.單項選擇題A line of position from a celestial observation is a segment of a （）.

A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle

2.單項選擇題A line of position derived from a loran reading is a section of a(n) （）.

A.straight line
B.arc
C.parabola
D.hyperbola

3.單項選擇題A light used to signal passing intentions must be an （）.

A.all-round yellow light only
B.all-round white light only
C.all-round blue light only
D.alternating red and yellow light

4.單項選擇題A light signal consisting of three flashes means （）.

A.I am in doubt as to your actions
B.My engines are full speed astern
C.I desire to overtake you
D.I am operating astern propulsion

5.單項選擇題A liferaft which has inflated bottom-up on the water（）.

A.should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards
B.should be righted by standing on the life line，holding the righting straps leaning backwards
C.will right itself when the canopy tube inflates
D.must be cleared of the buoyant equipment before it will right itself