What are the quadrantal spheres used for?

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What are the quadrantal spheres used for?

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🔍 Key Concepts

• Quadrantal spheres as part of magnetic compass compensation equipment • Difference between cardinal headings (N, E, S, W) and intercardinal headings (NE, SE, SW, NW) • Types of compass errors: deviation, heeling error, and errors from vertical soft iron

💭 Think About

• Ask yourself: when the compass is swung and adjusted, at which headings are the quadrantal spheres mainly used to correct errors? • Which part of the compass correction setup is normally adjusted first, and which part is specifically for four directions spaced 90° apart? • Consider what device or corrector is normally used to handle heeling error, and whether that is the same component as the quadrantal spheres.

✅ Before You Answer

• Be clear on the definition of quadrantal error and which headings it mostly affects. • Separate in your mind: which corrector acts on fore‑and‑aft and athwartships soft iron, and which one deals with heeling. • Verify which option mentions the group of headings that are 90° apart and would logically be linked to a "quadrantal" correction.

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Question 1 of 2066636ef128f7522a1c521ef3

What are the quadrantal spheres used for?

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Question 1 of 20

66636ef128f7522a1c521ef3

What are the quadrantal spheres used for?

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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