A.on loran charts covering areas where sky waves are used
B.in the Radio Aids to Navigation，PUB 117
C.in the Loran-C Correction Tables
D.Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
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A.full confirmation
B.precise appreciation
C.immediate assessment
D.timely recognition
A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
A.brightness of objects
B.color of targets
C.shape of targets
D.bearing of objects
A.Latitude
B.Longitude
C.Speed
D.Time
A.deviation
B.variation
C.local attraction
D.All of the above
最新試題
（）is a digitized“picture”of a chart.
The loran lines drawn on navigation charts represent（）.
Which one of the followings does not limit the effective range of radar（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Loran-C is which type of system（）.
What does not contribute to the commercial GPS receiver position error（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
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.
（）is not a component of GPS.