CELESTIAL-L3.4

Plotting sheets and the fix

CELESTIAL-M3 · Sight reduction and the position line · CELESTIAL-M3-A The intercept method of Marcq St Hilaire, worked by the cosine formula and by NP 401 and AP 3270, and plotted to a fix.

Mid-ocean there is no useful chart scale, so you build your own on a plotting sheet. The longitude scale is **cos(latitude)** of the latitude scale: 0.927 at 22°.

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.