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
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
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（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The information received by AIS will be displayed on（）.
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.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
What does not contribute to the commercial GPS receiver position error（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Would you please（）on the radar?
In using Loran-C，skywave reception gives greater range but is（）.