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
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
Radar makes the most accurate determination of the（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The loran lines drawn on navigation charts represent（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
Which one of the followings does not limit the effective range of radar（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
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.