A.21-Aug-99
B.21-Sep-99
C.Octoer 31，1999
D.31-Dec-99
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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
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
最新試題
The information received by AIS will be displayed on（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
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 is which type of system（）.
The loran lines drawn on navigation charts represent（）.
You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at sea，in what order should the following dockside adjustments be made（）.
（）is not a factor which will affect the accuracy of GPS receiver.
Automatic identification systems（AIS）are required to（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.