The second part of what used to be called the Home Trade Navigation Guide, now revised and published as two volumes. (See Vol. 1 Near Coastal Navigation). In this book elementary trigonometry and the use of logarithms is included as...
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..an introduction to celestial navigation calculations. Plane, parallel and Mercator sailing by trigonometrical methods is also included. Questions and Answers section. All relevant extracts and Tables provided. Index. HB. 300pp.
