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
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Radar makes the most accurate determination of the（）.
What does not contribute to the commercial GPS receiver position error（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
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.
Which of the following statements is TRUE regarding crane operations（）.
（）is not a component of GPS.
（）is not a factor which will affect the accuracy of GPS receiver.
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.