A.Rhythm
B.Period
C.Intensity
D.Color
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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
A.Flinders bar
B.transverse magnets
C.fore-and-aft magnets
D.soft iron spheres on the sides of the compass
最新試題
Loran-C is which type of system（）.
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（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Which of the following statements is TRUE regarding crane operations（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
To obtain accuracy in fixing by DF，（）and three stations should be used.
Would you mind（）your DF?
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（）.
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.