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Why Do Ships Have Two Balls?
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Correction of D & E by Soft Iron Sphere
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Soft Iron Spheres | Magnetic Compass | Merchant Navy #earth #navy #shiplife #magnetic
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Magnetic Compass Correction Explained | Flinders Bar, Soft Iron Spheres & Spare Iron | DGS MMD Exam
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Coefficient D & Soft Iron Spheres
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Parts of a magnetic compass - Video
4:10
Compass 3
2:10
The Marble - Animated Short Film
