04322nam 2200565 450 991078751330332120230721045218.01-4081-0639-6(CKB)2670000000421734(StDuBDS)AH25858491(SSID)ssj0001154218(PQKBManifestationID)11649872(PQKBTitleCode)TC0001154218(PQKBWorkID)11161482(PQKB)11727118(MiAaPQ)EBC1388980(MiAaPQ)EBC3003386(Au-PeEL)EBL3003386(OCoLC)928192106(EXLCZ)99267000000042173420130924h20081997 uy 0engur|||||||||||txtccrCelestial navigation for yachtsmen /Mary Blewitt12th ed.London :Adlard Coles Nautical,2008.©19971 online resource (72 p. ) illIncludes index.1-4081-3212-5 Cover -- Copyright -- Contents -- The Theory -- Heavenly Bodies -- The Geographical Position -- Declination -- Hour Angle -- The Zenith -- The Horizon -- Altitude -- Zenith Distance -- The Elevated Pole -- Azimuth and Azimuth Angle -- Great Circles -- Universal Time -- The Position Line -- The Meridian Passage -- Spherical Triangles -- The Intercept -- Sextant Altitude and True Altitude -- Dip -- Refraction -- Semi-Diameter -- Parallax -- The Practice -- Almanacs and Tables -- A Sun Sight in Winter -- Using the Sextant -- Recording the Sights -- Correcting the Data: Watch Time to UT -- -- Sextant Altitude to True Altitude -- Using the Almanac: LHA Sun from UT -- Using the Tables: Assuming a Position -- Declination -- Tabulated Altitude and Azimuth -- Plotting the Sight -- A Sun Sight in Summer -- A Moon Sight -- Planet Sights -- Meridian Sights -- Star Sights -- Sidereal Hour Angle -- Declinations -- Twilight and Preparation -- Selected Stars -- Precession and Nutation -- Using the Meridian Passage -- Pole Star Sights -- Selecting the Best Position -- NOTES -- Sextants -- Sextant Error: Index Error -- Side Error -- Spherical Triangles -- Calculators -- Concise Sight Reduction Tables -- Practice Sights -- Plotting Sheets -- APPENDICES -- A Nautical Almanac for 27-29 July 1997 -- B Nautical Almanac for 6-8 December 1997 -- C Increments and Corrections -- D Altitude Correction Tables 10°-90° for Sun, Stars, Planets -- E Altitude Correction Tables 0°-35° for the Moon -- Altitude Correction Tables 35°-90° for the Moon -- F AP3270 Vol 3: LHA, Dec, He, d, Z -- G AP3270 Vol 1: Selected Stars -- H AP3270 Correction Table 5 -- INDEX.The main concepts of astro navigation are the subject of this classic text that lends itself to being termed the 'Navigation Bible'. The principles of navigating without electronic aids are set down very clearly and succinctly.The 12th edition of this bestselling book is proof of thesuccess of Mary Blewitt's concise and clear style in explaining aparticularly difficult skill, and it has been the bible for manygenerations of ocean navigators. Since this book was first published, the huge advances in electronicnavigation have transported most offshore navigators to a world ofpress-button convenience. However, there is still a vital need fortraditional skills when things go wrong: batteries can fail, aerials gooverboard, and electronics have been known to get wet. A bestseller for over 50 years, Celestial Navigation for Yachtsmen isa model of simplicity and clarity. The worked examples require onlystraightforward addition and subtraction, which explains why this bookhas truly earned its reputation for admirable conciseness and formaking a tricky subject easy to understand. 'The "bible" of navigation for generations of yachtsmen... worth its weight in gold ' SailingNautical astronomyNavigationYachtingNautical astronomy.Navigation.Yachting.623.89Blewitt Mary28997MiAaPQMiAaPQMiAaPQBOOK9910787513303321Celestial navigation for yachtsmen3826934UNINA