Practice the full celestial navigation workflow: apply sextant altitude corrections (dip, refraction, semi-diameter, parallax), reduce a sun sight with the NAO Sight Reduction Tables, determine latitude from a meridian passage observation, and compute the azimuth to verify your compass. Covers the complete USCG Nav General celestial navigation module — the hardest section of the captain and mate exam.
Celestial navigation remains a USCG exam requirement and an IMO STCW competency at the Management Level. Free exam prep for Ocean Master, Master 1600 GRT, and all ocean-route endorsements.