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
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
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 heading of a vessel is indicated by what part of the compass? （）
Which one of the followings does not limit the effective range of radar（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Would you please（）on the radar?
You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at sea，in what order should the following dockside adjustments be made（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.