A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
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A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
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
最新試題
Which one of the followings does not limit the effective range of radar().
If the radio signal ground wave extends out for less distance than the minimum skywave distance,there is an area in which no signal is received.This is called the().
Radar makes the most accurate determination of the().
The operation of which aids to navigation may be suspended during war or national emergency().
()is a digitized“picture”of a chart.
Loran-C uses the multiple pulse system because().
The information received by AIS will be displayed on().
Which of the following statements is TRUE regarding automatic identification systems(AIS)().
Would you mind()your DF?
()is not a component of GPS.