Which navigational risk increases when an 18th-century mariner omits index error calibration from their sextant observations?

💡 Explanation

Latitudinal error increases due to the sextant's angular measurement inaccuracies from failing to calibrate the index error. Precise angular observations were essential to determine latitude, because errors impact their computations, therefore positional is now inaccurate, rather than affecting stability or chronometer accuracy.

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