A.deviation
B.variation
C.local attraction
D.All of the above
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A.at close range
B.at end on situation
C.at head on situation
D.at crossing situation
A.to get
B.to approach
C.to proceed
D.to close
A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only
A.Rhythm
B.Period
C.Intensity
D.Color
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
最新試題
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
（）is a digitized“picture”of a chart.
The loran lines drawn on navigation charts represent（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
When your vessel is proceeding to the area of traffic density，（）is used to determine the exact ranges of other ships or objects in the vicinity.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
（）is not a factor which will affect the accuracy of GPS receiver.
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.