Which challenge faced 18th-century lunar distance navigation increased positional uncertainty when using a sextant at sea?

💡 Explanation

Atmospheric refraction most influenced lunar distance accuracy because variations in air density altered the apparent angle between the moon and a star, resulting in measurement errors. Therefore, refraction, rather than instrument errors, posed a greater challenge under varying weather conditions.

• Which risk increased in medieval siege warfare due to cast iron components in bombards?
• Which outcome followed from improvements to drawloom design increasing silk production capacity in Byzantium?
• Which crucial innovation resulted when cast iron cannon production faced shattering?
• Which increased risk resulted from undermining a medieval castle wall?
• Which consequence occurred due to uncontrolled flame within the Byzantine empire's complex mechanical fire-launchers?
• Within Mughal gardens, which outcome results when the subsurface brick and mortar conduits experience seasonal volumetric expansion?