A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
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A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
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
最新試題
Would you mind（）your DF?
Radar makes the most accurate determination of the（）.
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 time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
Loran-C is which type of system（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
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.