CELESTIAL-L2.1

The sextant: parts, errors and adjustment

CELESTIAL-M2 · The sextant and the corrected altitude · CELESTIAL-M2-A The instrument, its errors and adjustment, taking a sight at sea, and turning sextant altitude into true altitude.

Three adjustable errors, checked and corrected in a fixed order: **perpendicularity, side error, index error**. This is oral-exam material, so know why as well as how.

Independent study. xplor is not an accredited training provider and awards no certificate or Certificate of Competency. The MCA 'Celestial Navigation' examination must be sat at an MCA-approved examination centre, and the Yachtmaster Ocean certificate is awarded only by the RYA after its own oral and written examination. AI-drafted content pending subject-matter-expert review.