A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only
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A.Rhythm
B.Period
C.Intensity
D.Color
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
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
最新試題
Automatic identification systems（AIS）are required to（）.
（）is a digitized“picture”of a chart.
Loran-C uses the multiple pulse system because（）.
Would you please（）on the radar?
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
What does not contribute to the commercial GPS receiver position error（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
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（）.
The heading of a vessel is indicated by what part of the compass? （）