The Haven-finding Art: A History of Navigation from Odysseus to Captain CookHollis and Carter for the Institute of Navigation, 1971 - 310 ページ |
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... altitude that you found from ninety , and add the declination . The sum will be the number of degrees you are north of the equinoctial . ' After working two examples the instructor adds ' and if you find an altitude of 90 ° [ when the ...
... altitude that you found from ninety , and add the declination . The sum will be the number of degrees you are north of the equinoctial . ' After working two examples the instructor adds ' and if you find an altitude of 90 ° [ when the ...
221 ページ
... altitude of the starre by the lesse staffe Parallaxis of the staffe 0.32 ' Surplus of the Horizon 0.5 ' to be abated added Therefore the altitude of the Pole 42.30 ' 0.37 ' 41.53 ' T.39 ' Therefore the true altitude of the starre The ...
... altitude of the starre by the lesse staffe Parallaxis of the staffe 0.32 ' Surplus of the Horizon 0.5 ' to be abated added Therefore the altitude of the Pole 42.30 ' 0.37 ' 41.53 ' T.39 ' Therefore the true altitude of the starre The ...
305 ページ
... altitude measured against fingers and palm , 49 ; observation of altitude for position , 125 ; star- sights used by Arabs , 128 ; altitude by hand and body measurements , 129 ; time determined by , 144 , 145-8 ; star - clock in ...
... altitude measured against fingers and palm , 49 ; observation of altitude for position , 125 ; star- sights used by Arabs , 128 ; altitude by hand and body measurements , 129 ; time determined by , 144 , 145-8 ; star - clock in ...
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actually altitude angle appears Arab astrolabe astronomers azimuth bearings called Cape century chart-makers chih Chinese circle clock coast correct course course sailed cross-staff degree Dicuil difference distance drawn east east-west eight English equator error example fact fathoms French Gemma Frisius Greek Greenland Gulf harbour Hariot horizon Hvitserk Iceland India instrument instrument-maker island Jean Rotz John Dee king land later latitude leagues lodestone longitude magnetic compass magnetic needle mariners master mathematical measure Mediterranean Mediterranean Sea meridian method miles minutes monsoon Moon nautical navigation night north-east north-west Nuñez observations ocean Odysseus pilots Plate Pole Star port Portuguese position Pytheas quadrant quarter reckoning rhumb rhumb lines rock round rutter sailing directions sailors scale seaman ship ship's shore sight south-east south-west Strabo tide tion turned variation voyage William Borough wind wind-rose writing