Davis Artificial Horizon Celestial Navigation Quick Reference Chart 2 Items

Davis Artificial Horizon & Celestial Navigation Quick Reference Chart (2 Items) Artificial Horizon: Answers the need of every sextant user who cannot depend on a natural sea horizon. Use for backyard practice, finding exact position when inland, and making exact sextant shot on foggy mornings. To use, fill with water and read the angle of the reflected sun with your sextant. Half your sextant reading is the sun & angle above the true horizon. Comes with two sun shades, a lid and full directions. Celestial Navigation. A simplified, yet complete Celestial Navigation system. Includes everything you need: sextant use and corrections, starfinder for 18 stars, data entry form, and step-by-step sight reduction and plotting procedures.