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
In using Loran-C，skywave reception gives greater range but is（）.
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（）.
Loran-C is which type of system（）.
Would you please（）on the radar?
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Which one of the followings does not limit the effective range of radar（）.
Loran-C uses the multiple pulse system because（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
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（）.