Which risk increased for navigators using a metal-framed sextant in high-latitude, cold environments?

💡 Explanation

When exposed to extreme cold, dissimilar metals within sextant frames experience differential thermal contraction, creating stress concentrations and potential brittle fracture. Therefore fracture risk increases, rather than fogging, lens distortion, or general corrosion which depend upon moisture or chemical exposure rather than solely on temperature differences.

• Which error arises when an astrolabe's alidade is misaligned relative to the horizon ring?
• Which outcome resulted when Islamic scholars used algebra to solve geometric construction problems?
• Which optical outcome led Alhazen to disprove emission theory of vision during medieval period?
• Within Alhazen's work on optics, 'Al-Manazir', which algebraic problem limited derivation of accurate lens refraction angles?
• Which outcome arises when a Roman aqueduct siphon experienced sedimentation buildup at the bottom of the U-bend?
• Which distortion arises when projecting Earth's spherical surface onto the flat plane of an astrolabe?