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When a historically used sextant aboard a ship experiences thermal expansion due external factors, which outcome most probably reduced navigation accuracy?

A)Increased angle measurement systematic error
B)Improved horizon visibility through lens
C)Reduced instrument weight when heated
D)Limb darkening effect became significant

💡 Explanation

Thermal expansion in the sextant's components can cause subtle shifts in the mirrors and frame, thereby introducing Parallax error and inaccurate angle measurements; because the device's scale is changed therefore position errors increase considerably, rather than those of optical enhancements under heat that aren't linked

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