The Haven-finding Art: A History of Navigation from Odysseus to Captain CookHollis & Carter, 1971 - 310 ページ |
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136 ページ
... difference between the hour of high tide and the Moon's passage across the meridian was only two hours or less instead of 3 hours 48 minutes . This difference 136 WITH COMPASS AND CHART.
... difference between the hour of high tide and the Moon's passage across the meridian was only two hours or less instead of 3 hours 48 minutes . This difference 136 WITH COMPASS AND CHART.
152 ページ
... difference , and therefore the longitude difference be- tween two places could be found . But since there must be a competent observer at either place furnished with Ephemerides , and each must have a precise means of measuring his ...
... difference , and therefore the longitude difference be- tween two places could be found . But since there must be a competent observer at either place furnished with Ephemerides , and each must have a precise means of measuring his ...
188 ページ
... difference , which is 16 ° 15 ' , and also the difference of their declinations , which is 4 ° 55 ' , and for greater ease in getting square roots I first reduce them to minutes . Then multiplying each one by itself I get for the first ...
... difference , which is 16 ° 15 ' , and also the difference of their declinations , which is 4 ° 55 ' , and for greater ease in getting square roots I first reduce them to minutes . Then multiplying each one by itself I get for the first ...
目次
SIGNS IN THE | 3 |
THE SURFACE AND FLOOR OF THE | 21 |
NAVIGATION WITHOUT MAGNETIC | 33 |
著作権 | |
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actually altitude altura angle appears Arab astrolabe astronomers azimuth bearings called Cape captain century chart-makers chih Chinese circle clock coast correct course Course Sailed cross-staff degree difference distance drawn east east-west eight English equator error example fact fathoms French Gemma Frisius Greek harbour Hariot horizon Iceland India instrument instrument-maker island Italian Jean Rotz John Dee king knew land later latitude leagues lodestone longitude magnetic compass magnetic needle manual mariners Marteloio master mathematical measure Mediterranean Mediterranean Sea meridian method miles minutes Moon nautical navigation night north-east north-west Nuñez observations ocean Odysseus pilots plain chart Plate Pole Star port Portuguese position Pytheas quadrant quarter reckoning rhumb rhumb lines round rutter sailing directions sailors scale seaman ship ship's sight south-east south-west Strabo tide tion turned variation voyage William Borough wind wind-rose writing