Which statement best describes a source of compass error?

Which statement best describes a source of compass error?

• A. Keeping the compass near iron, steel, and electrical devices
• B. Keep away from iron, steel, electrical devices, and other magnetic sources
• C. Rely on the compass only in daylight
• D. Ignore magnetic interference if visibility is good

Answer: (B)

Magnetic interference from nearby ferrous metals and electrical devices disturbs the magnetic field the compass senses, causing heading readings to be off. Therefore, the best approach is to keep the compass away from iron, steel, electrical devices, and other magnetic sources. This minimizes deviation and keeps readings reliable. The other statements either would increase interference, are irrelevant to compass accuracy, or imply you can ignore interference when visibility is good.

Magnetic interference from nearby ferrous metals and electrical devices disturbs the magnetic field the compass senses, causing heading readings to be off. Therefore, the best approach is to keep the compass away from iron, steel, electrical devices, and other magnetic sources. This minimizes deviation and keeps readings reliable. The other statements either would increase interference, are irrelevant to compass accuracy, or imply you can ignore interference when visibility is good.