Which navigational risk increased on 18th-century voyages when excessive temperature changes degrade sextant mirrors?

💡 Explanation

Cumulative dead reckoning inaccuracy increases, because thermoelastic bending misaligns the index mirror. This generates systematic angular errors via observational drift, therefore larger positional imprecision accumulates during long voyages, rather than maintaining accuracy with celestial fixes.

• Which material failure arises when exceeding Mesopotamian bronze axes' annealing temperature?
• Which outcome arises from differential aeration on submerged bronze components of Mesopotamian irrigation systems?
• During Inca administration of terraced farmland, which consequence arose when a quipu failed to accurately represent crop yields?
• Which mechanism limited Mesopotamian bronze tools used for quarrying limestone before the Iron Age?
• Which data loss outcome arises when the quipu numerical encoding scheme in Inca civilization is misinterpreted, despite physically intact strings?
• Which function was enabled by the geared mechanism within medieval Islamic mechanical astrolabes?