我
- A.Quadrantal spheres
- B.Heeling magnets
- C.Flinders bar
- D.Fore-and-aft magnets
- A.The soft iron spheres on the arms of the binnacle
- B.Magnets placed in trays inside the binnacle
- C.A single vertical magnet beneath the compass
- D.The Flinders bar
- A.Course per magnetic steering compass
- B.Gyro error
- C.Variation
- D.Maximum rudder angle previously used
- A.The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings
- B.After the new heading is reached，the vessel should steam on that course for at least two minutes before the adjustment
- C.During the course change，you should gently tap the compass to remove any error caused by friction on the pivot bearing
- D.After steadying on the new heading，the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error
- A.Flinders bar should be inverted
- B.Heeling magnet should be inverted
- C.The quadrantal spheres should be rotated 180°
- D.Flinders bar should be moved to the opposite side of the binnacle
- A.will add to
- B.will subtract from
- C.may add to or subtract from
- D.will not change
- A.Flinders bar
- B.Soft iron spheres
- C.Fore-and-aft permanent magnets in their trays
- D.Heeling magnet
- A.Comparing the gyro azimuth of a celestial body with the computed azimuth of the body
- B.Comparing the gyro heading with the magnetic compass heading
- C.Determining from the chart the course made good between celestial fixes
- D.It cannot be determined accurately at sea due to drift of unknown currents
- A.Damping error
- B.Ballistic deflection
- C.Quadrantal error
- D.Speed error
- A.permanent magnetism
- B.subpermanent magnetism
- C.induced magnetism
- D.variable magnetism
