| This famous set of mathematical tables was first published in 1803. Ithas been a bestseller ever since, and despite developments inelectronic navigation it remains an essential requirement for anyonelearning and practising astro-navigation. Last updated in 1994, theeditor, George Blance, has worked for some time on the modernisation ofall the tables for this major new edition. New tables havebeen included, obsolete ones deleted to conform with changingtechniques of navigation, with the aim of improving the accuracy of thecalculated position and reducing the tedium of the calculation. Allthe tables required for coastal and deep sea navigation are included Asimple uniform method of interpolation for all the trigonometricaltables is used Certain tables and data are also included which are notreadily available on board ship or are only used in the examinationroom. The section Seaports of the World has also beenextensively updated and restructured with several hundred additionalports. The ports are listed geographically in the following order fromArctic Russia, Scandinavia, the Baltic Sea, the Atlantic coast ofEurope, the Mediterranean Sea, West Africa, East Africa, Arabia, thePersian Gulf, the Indian sub-continent, the Far East, Australasia, thewest coast of North and South America, the east coast of North andSouth America. At the back of the section is an index of the seaports.
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