Which limitation arises when using a brass astrolabe to measure stellar altitudes over decades in a coastal environment?

💡 Explanation

Continuous salt exposure causes oxidation, so markings erode over decades, as a consequence of humidity and salinity, impairing accuracy. Therefore erosion dominates, rather than parallax, deformation or magnetic issues, which are either less time dependent or avoided through careful instrument handling and non-ferrous construction.

• Which structural consequence resulted from the Great Dome of Florence lacking sufficient iron chain reinforcement during construction?
• Which algebraic outcome resulted from Al-Khwarizmi's method of 'al-jabr' when solving quadratic equations involving geometric areas?
• Which mechanism enabled Ibn al-Haytham to accurately calculate the angle of refracted light rays through spherical segments?
• Which risk increases when Roman concrete (opus caementicium) is exposed to seawater for extended periods?
• Which defensive outcome arose when medieval castle builders implemented concentric curtain walls?
• Which outcome results from the use of forced-air induction in early piston-engine aircraft operating at high altitude?