A.21-Aug-99
B.21-Sep-99
C.Octoer 31，1999
D.31-Dec-99
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A.Flinders bar
B.transverse magnets
C.fore-and-aft magnets
D.soft iron spheres on the sides of the compass
A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
最新試題
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
The loran lines drawn on navigation charts represent（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Automatic identification systems（AIS）are required to（）.
Which of the following statements is TRUE regarding crane operations（）.
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.
（）is a digitized“picture”of a chart.