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
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
The information received by AIS will be displayed on（）.
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（）.
Radar makes the most accurate determination of the（）.
The loran lines drawn on navigation charts represent（）.
Automatic identification systems（AIS）are required to（）.
Which of the following statements is TRUE regarding crane operations（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
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.