A.poor fix
B.good fix
C.poor signal quality
D.good signal quality
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A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5° With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed
A.two red lights
B.one green light
C.one white light
D.one amber light
A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
A.straight line
B.arc
C.parabola
D.hyperbola
A.all-round yellow light only
B.all-round white light only
C.all-round blue light only
D.alternating red and yellow light
最新試題
The latest known details of lights are given in（）.
A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.
Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.
After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.
When an azimuth of the Sun has been taken and the deviation of the standard magnetic compass computed，the watch officer should record the results（）.
The light vessel is reported（）.
The information on（）is not likely found in The Mariners Handbook.
Many of the lights on this coast are placed so high as to be frequently obscured by（）.
Mean high water is the average height of（）.
On an Atlantic Ocean voyage from New York to Durban，South Africa，you should expect the Agulhas Current to present a strong（）.