A.varies depending upon the bearing used
B.is the angular difference between magnetic north and compass north
C.is published on the compass rose on most nautical charts
D.is the angular difference between geographic and magnetic meridians
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A.RINGS INT
B.SWEEP INT
C.REPEATER
D.GONIOMETER
A.ZERO CLEARING
B.ANTI-CLUTTER-RAIN
C.DIMMER
D.CURSOR
A.bearing circle
B.pelorus
C.bearing bar
D.alidade
A.spider element
B.sensitive element
C.link arm
D.pickup transformer
A.high or low
B.AC or DC
C.strong or weak
D.on or off
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（）is not a component of GPS.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
The information received by AIS will be displayed on（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
Loran-C is which type of system（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
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.
Radar makes the most accurate determination of the（）.