Contents: Astro-Navigation by NC-2; Taking sights with a sextant; finding greenwich hour angle and declination in the nautical almanac; computation and plotting; sextant altitude corrections; identification of unknown star. Digital Navigation by NC-2: Dead reckoning and piloting by NC-2; navigating through current and wind by NC-2; Glossary of useful mathematics for Navigation. Appendix: Explanation of NC-2 astro-navigation calculator. Includes a LOP computation card, NC_2. ; Tamaya NC-2

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