True heading differs from magnetic heading...

Question 1 / 2066636ee928f7522a1c51a3c5

Question 1 of 2066636ee928f7522a1c51a3c5

True heading differs from magnetic heading by __________.

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Question 1 of 20

66636ee928f7522a1c51a3c5

True heading differs from magnetic heading by __________.

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🔍 Key Concepts

• True heading vs. magnetic heading vs. compass heading • The definitions of variation and deviation • How compass error is related to variation and deviation

💭 Think About

• Start from true and think about what natural, charted influence changes it before you even touch the ship’s compass. • Ask yourself: which term is printed on the compass rose of a nautical chart and shows the relationship between true north and magnetic north? • Consider which term depends on the ship’s own magnetic fields and which term exists everywhere on earth, even without a vessel.

✅ Before You Answer

• Be clear which norths you are comparing: true north vs. magnetic north, not compass north. • Verify which quantity is shown as degrees East or West on the outer/inner scale of the compass rose on charts. • Confirm that deviation is specific to each vessel and heading, while the other quantity is a property of the earth’s magnetic field in that area.

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Question 1 of 20

True heading differs from magnetic heading by __________.

deviation

compass error

variation

northerly error

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