A.Latitude
B.Longitude
C.Speed
D.Time
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A.deviation
B.variation
C.local attraction
D.All of the above
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
最新試題
（）is a digitized“picture”of a chart.
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（）.
Which of the following statements is TRUE regarding crane operations（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Loran-C uses the multiple pulse system because（）.
（）is not a component of GPS.
The loran lines drawn on navigation charts represent（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
Automatic identification systems（AIS）are required to（）.
Loran-C is which type of system（）.