A.Card
B.Needle
C.Lubber's line
D.Gimbals
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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
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
最新試題
（）is not a factor which will affect the accuracy of GPS receiver.
The loran lines drawn on navigation charts represent（）.
Which one of the followings does not limit the effective range of radar（）.
Loran-C uses the multiple pulse system because（）.
Loran-C is which type of system（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
What does not contribute to the commercial GPS receiver position error（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.