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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... scale . The second - century maps of the mathe- matician Ptolemy , which were drawn on a network of latitude and longitude , were automatically drawn to the scale provided by the measure of the degree of the meridian . But these were ...
... scale . The second - century maps of the mathe- matician Ptolemy , which were drawn on a network of latitude and longitude , were automatically drawn to the scale provided by the measure of the degree of the meridian . But these were ...
228 ページ
... scale of meridional parts , besides three or four scales for other purposes . An import- ant one of these , which went all along one edge of the opened - out sector , was the Line of Lines , a set of equal divisions , subdivided into ...
... scale of meridional parts , besides three or four scales for other purposes . An import- ant one of these , which went all along one edge of the opened - out sector , was the Line of Lines , a set of equal divisions , subdivided into ...
237 ページ
... scale . If this does not also coincide with a division on the main scale , the eye is carried along the latter until a vernier and main - scale division are found which coincide . Suppose this is 4 on both scales , then the reading is ...
... scale . If this does not also coincide with a division on the main scale , the eye is carried along the latter until a vernier and main - scale division are found which coincide . Suppose this is 4 on both scales , then the reading is ...
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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