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← HistoryWhen 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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