Which limitation arises when aligning a medieval astrolabe primarily using magnetic north instead of true north?

💡 Explanation

When using magnetic north, magnetic declination causes angular offset between the astrolabe's orientation and true meridian, skewing altitude and azimuth readings required for astronomical calculations. Therefore, celestial altitude measurements become skewed, rather than time restricted to lunar cycles, daytime-only latitude, or inverted planetary positions which don't directly result from declination error.

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