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
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The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
Would you mind（）your DF?
Would you please（）on the radar?
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.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
Which of the following statements is TRUE regarding crane operations（）.
Loran-C uses the multiple pulse system because（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
The line connecting the Loran-C master station with a secondary station is called the（）.