A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
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A.21-Aug-99
B.21-Sep-99
C.Octoer 31，1999
D.31-Dec-99
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
最新試題
（）is not a factor which will affect the accuracy of GPS receiver.
Which one of the followings does not limit the effective range of radar（）.
（）is a digitized“picture”of a chart.
Which statement concerning GPS is TRUE（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The information received by AIS will be displayed on（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.