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I'll expand a bit on how one would use a sextant to locate the north or south pole. The basic arrangement needs a horizontal reflective plane, for which Amundsen used a pool of mercury. A precisel...
Answer
I'll expand a bit on how one would use a sextant to locate the north or south pole. The basic arrangement needs a horizontal reflective plane, for which Amundsen used a pool of mercury. A precisel...