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
（）is not a component of GPS.
The information received by AIS will be displayed on（）.
In using Loran-C，skywave reception gives greater range but is（）.
Would you please（）on the radar?
Radar makes the most accurate determination of the（）.
Which statement concerning GPS is TRUE（）.
Loran-C uses the multiple pulse system because（）.
Automatic identification systems（AIS）are required to（）.
Which one of the followings does not limit the effective range of radar（）.
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.