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The real reason ships have two balls by the compass, correcting magnetic errors at sea
Those two metal spheres are not decoration, they are Kelvin’s balls, part of a precise system that counteracts magnetic errors caused by steel hulls. This explains how permanent and induced magnetism ...
Anschütz has claimed a new benchmark in naval navigation with its SYNAPSIS WECDIS NX, a system with a powerful mix of ...
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Why ships have two big metal balls on the compass stand, the simple fix for a steel ship’s magnetic errors
Modern steel ships warp a magnetic compass with both permanent and induced magnetism, and the binnacle is packed with clever countermeasures to cancel it out. This breaks down hard iron vs soft iron ...
THE subject of this lecture is the gyrostatic compass, often called the gyro-compass. An engineer of my acquaintance was asked if he under-stood what a gyro-compass was, and he replied, “Of course I ...
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