Deck : General Navigation - 607/2138
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| Which of the following is the most accurate method of determining gyrocompass error while underway? |
| A) determining from the chart the course made good between celestial fixes |
| B) comparing the gyro azimuth of a celestial body with the computed azimuth of the body |
| C) comparing the gyro heading with the magnetic compass heading |
| D) It cannot be determined accurately at sea due to drift of unknown currents. |
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