A.to get
B.to approach
C.to proceed
D.to close
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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
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
最新試題
Would you mind（）your DF?
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Automatic identification systems（AIS）are required to（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
（）is a digitized“picture”of a chart.
In using Loran-C，skywave reception gives greater range but is（）.
What does not contribute to the commercial GPS receiver position error（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.