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- Master & Chief Mate (Oceans or Near Coastal (Offshore Supply Vessel)) »
- Q203 - Navigation General: Near Coastal
129. Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. Which are the correctors?
The Flinders bar and quadrantal spheres are soft-iron correctors that must be free of permanent magnetism to ensure they respond only to the Earth's magnetic field.
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