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
Automatic identification systems（AIS）are required to（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Loran-C uses the multiple pulse system because（）.
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（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
The loran lines drawn on navigation charts represent（）.
The heading of a vessel is indicated by what part of the compass? （）
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）（）.