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
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（）.
The loran lines drawn on navigation charts represent（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Automatic identification systems（AIS）are required to（）.
Loran-C is which type of system（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
The heading of a vessel is indicated by what part of the compass? （）
（）is not an alarm required by IMO standards to be available on the ECDIS.
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（）.
Loran-C uses the multiple pulse system because（）.