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
The loran lines drawn on navigation charts represent（）.
What does not contribute to the commercial GPS receiver position error（）.
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 line connecting the Loran-C master station with a secondary station is called the（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Which of the following statements is TRUE regarding crane operations（）.
The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
In using Loran-C，skywave reception gives greater range but is（）.