A.Along the magnetic equator
B.Connected by the isoclinal line
C.The isopors
D.The magnetic poles
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A.purple
B.orange
C.blue
D.yellow
A.the primary great circle of the Earth perpendicular to the axis
B.the line to which all celestial observations are reduced
C.the line from which a celestial body's altitude is measured
D.All of the above
A.Flashing red lights upstream and fixed red lights downstream
B.Yellow unlighted buoys
C.Signs and/or flashing red lights
D.Red daymarks upstream and green daymarks downstream
A.Indicates the limits of the navigable channel
B.Indicates a danger area
C.Is used to identify the characteristics of the light
D.Serves no significant purpose
A.Mercator
B.Gnomonic
C.Azimuthal
D.Lambert conformal
最新試題
The equator is（）.
When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.
What is an ebb current（）.
Traffic separation schemes adopted by the IMO are listed in（）.
When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.
Which statement concerning current is TRUE（）.
When entering a channel from seaward，the numbers on buoys（）.
You should plot your dead reckoning position（）.
Depiction of TSS's on charts uses（）as the primary color.
On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.