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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... Course Sailed True Course G Fig . 13. Ramon Lull's explanation of the course sailed and the course made good . The ' instrument ' ( instrumentum ) can be none other than the table , without which his answer is meaningless . But in fact ...
... Course Sailed True Course G Fig . 13. Ramon Lull's explanation of the course sailed and the course made good . The ' instrument ' ( instrumentum ) can be none other than the table , without which his answer is meaningless . But in fact ...
119 ページ
... course into its northing and easting as in later practice , since medieval sailing had no relation to latitude and longitude . The sole necessary datum was the number of quarter - winds ( i.e. the angle ) between the true course and the ...
... course into its northing and easting as in later practice , since medieval sailing had no relation to latitude and longitude . The sole necessary datum was the number of quarter - winds ( i.e. the angle ) between the true course and the ...
133 ページ
... course is west - south - west and east - north - east . And take your sight on the mainland of Wales , Rhyddlan , and the Red Bank in Chester Water , north and south . ' ( The course should actually have been west - north - west and ...
... course is west - south - west and east - north - east . And take your sight on the mainland of Wales , Rhyddlan , and the Red Bank in Chester Water , north and south . ' ( The course should actually have been west - north - west and ...
目次
SIGNS IN THE | 5 |
THE SURFACE AND FLOOR OF THE | 21 |
THE IRISH and the NORSEMEN | 65 |
著作権 | |
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actually altitude altura angle Arab astrolabe astronomers azimuth bearings called Cape captain century chart-makers chih Chinese chronometer circle clock coast correct course course sailed cross-staff degree diagram difference distance drawn east east-west eight English Ephemerides equator equinoctial error example fact fathoms French Gemma Frisius Hariot horizon India instrument instrument-maker island Jean Rotz John John Dee king land later latitude leagues lodestone magnetic compass magnetic needle manual mariners Marteloio master mathematical measure Mediterranean Mediterranean Sea meridian method miles minutes Moon nautical navigation night north-east Nuñez observations Ocean pilots plain chart Plate Pole Star port Portuguese position quadrant quarter reckoning rhumb rhumb lines right ascension Rotz rule rutter sailing directions sailors scale seaman ship ship's sight south-east south-west Sun's Thomas Hariot tide tion triangle variation voyage William Borough wind wind-rose writing