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 line connecting the Loran-C master station with a secondary station is called the（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Automatic identification systems（AIS）are required to（）.
Which statement concerning GPS is TRUE（）.
What does not contribute to the commercial GPS receiver position error（）.
The loran lines drawn on navigation charts represent（）.
Which one of the followings does not limit the effective range of radar（）.