A.at close range
B.at end on situation
C.at head on situation
D.at crossing situation
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A.to get
B.to approach
C.to proceed
D.to close
A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only
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
最新試題
To obtain accuracy in fixing by DF，（）and three stations should be used.
Which statement concerning GPS is TRUE（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Automatic identification systems（AIS）are required to（）.
Which one of the followings does not limit the effective range of radar（）.
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（）.
Loran-C uses the multiple pulse system because（）.
Would you please（）on the radar?
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
The line connecting the Loran-C master station with a secondary station is called the（）.