If a ship is proceeding towards the magnetic...

Question 1 / 2707066636ee928f7522a1c51a0a0

Question 1 of 2707066636ee928f7522a1c51a0a0

If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?

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Question 1 of 27070

If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?

🔍 Key Concepts

• Permanent magnetism of the ship’s hull and how it was acquired • How magnetic latitude (moving toward or away from the magnetic equator) affects vertical and horizontal components of the Earth’s magnetic field • Difference between permanent and induced magnetism in a steel vessel

💭 Think About

• Think about what happens to the Earth’s magnetic field lines as you move from higher magnetic latitudes toward the magnetic equator. Do they become more vertical or more horizontal? • Ask yourself: permanent magnetism in the ship is fixed in the ship’s structure—so what actually changes with latitude: the ship’s magnetism, or the Earth’s field acting on it? • Consider whether a deviation card made in higher latitudes would still be valid near the magnetic equator. Would the deviation values get larger, smaller, or stay about the same?

✅ Before You Answer

• Be clear on the definition of permanent magnetism vs induced magnetism and which one changes with latitude. • Verify how the vertical component of the Earth’s magnetic field changes as you approach the magnetic equator and how that affects the heeling and quadrantal errors. • Check whether textbooks say that deviation due to permanent magnetism is largely independent of latitude or is strongly affected by changes in magnetic latitude.

Question 1 of 27070

If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?

It remains the same

It is unimportant and may be neglected

The deviation will decrease

The deviation will increase

Question 1 / 2707066636ee928f7522a1c51a0a0

Question 1 of 2707066636ee928f7522a1c51a0a0

If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?

Back

Question 1 of 27070

If a ship is proceeding towards the magnetic equator, which is TRUE concerning the uncorrected deviation due to permanent magnetism?