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
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
Automatic identification systems（AIS）are required to（）.
（）is not a factor which will affect the accuracy of GPS receiver.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
Loran-C uses the multiple pulse system because（）.
The information received by AIS will be displayed on（）.
The heading of a vessel is indicated by what part of the compass? （）
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.