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
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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
A.fore-and-aft and athwartships magnets
B.dip needle and heeling magnet
C.heeling magnet and Flinders bar
D.Flinders bar and quadrantal spheres
A.Decreasing loran readings on 9960-W
B.Visual bearings of Montauk Point Lt. changing to the left
C.Increasing bearings of Southeast Point Light
D.Decreasing soundings
最新試題
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.
The loran lines drawn on navigation charts represent（）.
The information received by AIS will be displayed on（）.
（）is a digitized“picture”of a chart.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
What does not contribute to the commercial GPS receiver position error（）.
When your vessel is proceeding to the area of traffic density，（）is used to determine the exact ranges of other ships or objects in the vicinity.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Which one of the followings does not limit the effective range of radar（）.
（）is not a factor which will affect the accuracy of GPS receiver.