Question 626Navigation General70% to pass
Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the _______________.
AI Explanation
The correct answer is B) Flinders bar and quadrantal spheres.
Before a magnetic compass is adjusted, the Flinders bar and quadrantal spheres must be checked to ensure they are free of permanent magnetism. The Flinders bar is used to correct for the vertical component of the Earth's magnetic field, while the quadrantal spheres are used to correct for the horizontal component. Ensuring these correctors are free of permanent magnetism is crucial for accurate compass readings.
The other options are incorrect because they do not represent the proper correctors that must be checked before a magnetic compass is adjusted. Fore-and-aft and athwartships magnets, the heeling magnet, and the dip needle are not the primary correctors that need to be checked in this situation.
Related Questions
#624 When adjusting a magnetic compass for error, a deviation table should be made _______________.#625 Deviation which is maximum on intercardinal compass headings may be removed by the _______________.#627 The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval? #628 The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as _______________.#629 Magnetic compass deviation _______________.