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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... Horizon Fig . 4. The quarters of the horizon named by the Norsemen . Denmark and Scandinavia , as it happens , run roughly from south to north , and it was very natural to distinguish directions east of the meridian as ' land - north ...
... Horizon Fig . 4. The quarters of the horizon named by the Norsemen . Denmark and Scandinavia , as it happens , run roughly from south to north , and it was very natural to distinguish directions east of the meridian as ' land - north ...
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... horizon , then a star 35 ° from the pole will make a circle that just grazes the horizon at its lowest point , actually at the north point of the horizon . Now the elevation of the pole at any point of observation is equal to the ...
... horizon , then a star 35 ° from the pole will make a circle that just grazes the horizon at its lowest point , actually at the north point of the horizon . Now the elevation of the pole at any point of observation is equal to the ...
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... horizon had already been aligned . The second ( fixed ) mirror was half quicksilvered , half plain , and when the mirror on the index arm stood at zero the horizon ( i.e. the edge of the sea ) was brought to such a position that the ...
... horizon had already been aligned . The second ( fixed ) mirror was half quicksilvered , half plain , and when the mirror on the index arm stood at zero the horizon ( i.e. the edge of the sea ) was brought to such a position that the ...
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