A.brightness of objects
B.color of targets
C.shape of targets
D.bearing of objects
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A.Latitude
B.Longitude
C.Speed
D.Time
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
最新試題
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
（）is a digitized“picture”of a chart.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
Loran-C is which type of system（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
In using Loran-C，skywave reception gives greater range but is（）.
The heading of a vessel is indicated by what part of the compass? （）
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 required to be broadcast every 1 to 10 seconds（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.