A.spider element
B.mercury ballistic
C.gyrotron
D.rotor
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A.the horizontal component of the permanent magnetism
B.deviation caused by the vessel's inclination from the vertical
C.induced magnetism in the horizontal soft iron
D.induced magnetism in the vertical soft iron
A.bearing circle
B.pelorus
C.bearing bar
D.alidade
A.RINGS INT
B.SWEEP INT
C.REPEATER
D.GONIOMETER
A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
A.remains aligned with compass north
B.also turns to starboard
C.first turns to starboard then counterclockwise to port
D.turns counterclockwise to port
最新試題
What does not contribute to the commercial GPS receiver position error（）.
The line connecting the Loran-C master station with a secondary station is called the（）.
The information received by AIS will be displayed on（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
In using Loran-C，skywave reception gives greater range but is（）.
Loran-C uses the multiple pulse system because（）.
The operator of the ship’s radiotelephone，if the radiotelephone is carried voluntarily，must hold at least a（）.
（）is a digitized“picture”of a chart.
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（）.