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← HistoryWhich navigational outcome arises when humid air affects a brass-framed sextant's scale?
A)Increased instrument's parallax error reading
B)Reduced clarity of the horizon view
C)Inaccurate celestial body altitude reading✓
D)Greater susceptibility to magnetic declination
💡 Explanation
Changes in humidity cause differential Thermal expansion within the brass components of the sextant, thus causing Scale distortion. This yields an inaccurate celestial body altitude reading because of the altered angular divisions, rather than parallax or horizon clarity issues.
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