The permanent magnetism of a vessel may...

The permanent magnetism of a vessel may...

Question 1 of 2921866636ee928f7522a1c519e1b

The permanent magnetism of a vessel may change in strength due to __________.

Question 1 of 29218

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Q

The permanent magnetism of a vessel may change in strength due to __________.

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🔍 Key Concepts

• Permanent magnetism vs. induced magnetism in a steel vessel • How mechanical shock (such as impact or vibration) can affect magnetism • Effects of strong external magnetic fields or electrical discharges (like lightning) on steel hulls

💭 Think About

• Ask yourself which options describe conditions that could rearrange or disturb the magnetic domains in the ship’s steel structure. • Consider whether a steady, unchanging condition is more likely to increase, decrease, or stabilize permanent magnetism. • Think about which events involve sudden, powerful forces—either mechanical or electromagnetic—that could alter existing magnetism.

✅ Before You Answer

• For each choice, decide if it involves sudden impact or strong electromagnetic influence. • Check your understanding of whether long-term rest on one heading changes permanent magnetism or mainly affects induced magnetism and deviation. • Before selecting, be sure you can explain in your own words how each listed event would or would not change the vessel’s permanent magnetism.