The Theory and Practice of Finding the Longitude at Sea Or Land: To which are Added, Various Methods of Determining the Latitude of a Place, and Variation of the Compass; with New Tables. By Andrew Mackay, ...J. Sewell, P. Elmsly, and J. Evans, 1793 |
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Σελίδα vi
... absolute neceffity of taking obfervations , when opportunity offers , for obtaining with accuracy the true place of the ship . At fea , the latitude of the fhip is eafily deduced either from the meridian altitude of the Sun , or from ...
... absolute neceffity of taking obfervations , when opportunity offers , for obtaining with accuracy the true place of the ship . At fea , the latitude of the fhip is eafily deduced either from the meridian altitude of the Sun , or from ...
Σελίδα viii
... altitude of any celestial object , in order to reduce it to the true altitude . In book third is contained a complete fyftem of lunar obfervations , with an introductory account of this me- thod of finding the longitude at fea . It alfo ...
... altitude of any celestial object , in order to reduce it to the true altitude . In book third is contained a complete fyftem of lunar obfervations , with an introductory account of this me- thod of finding the longitude at fea . It alfo ...
Σελίδα x
... true 108 108 - 27 28 1 217 26 232 221 7862 arc first - arc fecond + b . 2 fame the - + L. 2 . fame time , the an obfervation arc fecond arc first O F THE FIRST VOLUM E. BOOK I. In which To reduce the true altitude of the Sun to its appa-
... true 108 108 - 27 28 1 217 26 232 221 7862 arc first - arc fecond + b . 2 fame the - + L. 2 . fame time , the an obfervation arc fecond arc first O F THE FIRST VOLUM E. BOOK I. In which To reduce the true altitude of the Sun to its appa-
Σελίδα 6
... altitude is measured from the fenfible Horizon ; and in either cafe the altitude must be reduced to the true Horizon . The ZENITH of any given place , is the point immediately above that * It may be alfo neceffary to mention another ...
... altitude is measured from the fenfible Horizon ; and in either cafe the altitude must be reduced to the true Horizon . The ZENITH of any given place , is the point immediately above that * It may be alfo neceffary to mention another ...
Σελίδα 7
... altitude is corrected for the depreffion of the Horizon , and the er- rors arifing from the inftrument , it is called the Apparent Altitude ; and when reduced to the true Horizon , it is called the True Altitude ; altitudes are ...
... altitude is corrected for the depreffion of the Horizon , and the er- rors arifing from the inftrument , it is called the Apparent Altitude ; and when reduced to the true Horizon , it is called the True Altitude ; altitudes are ...
Άλλες εκδόσεις - Προβολή όλων
The Theory and Practice of Finding the Longitude at Sea Or Land: To Which ... Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
The Theory And Practice Of Finding The Longitude At Sea Or Land Andrew MacKay Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
Aberdeen add the log adjuſtment alfo alſo anfwering angle apparent altitude apparent diſtance arc fecond arc firft arch Arcturus arifing azimuth becauſe cafe co-fecant co-fine co-tangent Co-verfed computing correction correfponding courſe degrees Diff dift divifion Earth ecliptic emerfion equal altitudes equation error fame fecant feen femidiameter fextant fhip fhould figns fince finding the Longitude firſt Fixed Star folar ftar fubtract given glaſs greateſt Greenwich half Hence horizon glafs horizontal parallax increaſe inftrument interfection interval laſt latitude lefs limb logarithm mean meaſured meridian method Moon moſt motion muſt Nautical Almanac neareſt neceffary nonagefimal noon obferved altitude object Obliq paffing place of obfervation planet pofition purpoſe quadrant reduced Reduced latitude refraction Rifing ſhip ſtar Sun's right afcenfion tangent teleſcope thefe theſe tion tranfit true altitude true diſtance true longitude tude uſed variation Verfed Verfed fine watch weft zenith diſtance ΙΟ