Navigation and Nautical Astronomy (Classic Reprint)

Navigation and Nautical Astronomy (Classic Reprint)
Navigation and Nautical Astronomy (Classic Reprint)
Excerpt from Navigation and Nautical AstronomyThe earlier portion of this book deals with that division of the subject which does not require a knowledge of astronomical definitions, nor, with the exception of Great Circle Sailing, of Spherical Trigonometry; the investigation of Raper's Rules for finding the distance from a Mountain Peak being inserted in the chapter on "Fixing a ship's position on a chart."The second portion - the various necessary definitions having been stated and an explanation given of the method of constructing Nautical Astronomy diagrams - consists of the discussion of Time, Greenwich Date, Sextant, Altitudes and the rules for their correction; Longitude, Latitude, Chronometer and Compass Errors; Day's Work and Sumner's Method. This concludes the really practical portion, and then follows a chapter containing the investigation of the various corrections, Dip, Parallax, etc.; and of the errors produced in Longitude, Latitude, etc., by small errors in time or observation. These errors are treated geometrically, and are thus shortly and simply explained without the use of Differential Calculus (not admissible in an elementary work) or the long analytical methods which usually take its place.The last chapter contains the investigation of Latitude by observation of the Pole Star; Equation of Equal Altitudes (the first method a short and simple one, much preferable to the ordinary method, which is, however, inserted as being familiar to many); Time at which the Sun will dip in a ship steaming at a high rate of speed; Interpolations; and a few other problems of interest in Nautical Astronomy.A number of Miscellaneous Examples is added, which it is hoped will provide, in many cases, exercises for the student's ingenuity.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.Эта книга будет изготовлена в соответствии с Вашим заказом по технологии Print-on-Demand компанией ООО «Книга по Требованию». Print-on-Demand - это технология печати книг по Вашему заказу на цифровом типографском оборудовании. Книга, произведенная по технологии Print-on-Demand (POD) представляет собой классическую печатную книгу с соблюдением всех стандартов качества, от офсетной бумаги и плотного картона до качественного клея, используемого при изготовлении. Черно-белая текстовая или полноцветная иллюстрированная книга (в зависимости от исходного файла, подготовленного к печати) может быть изготовлена в разных вариантах: - в мягкой обложке (Клеевое Бесшвейное Скрепление); - скрепление скобой (для книг с небольшим количеством страниц); - в твердом переплете с клееным текстовым блоком; Материалы, используемые при производстве книги: - бумага текстового блока - офсетная (белая или кремовая) 80 г/м2 - мягкая обложка - бумага мелованная 250 г/м2; - ламинация обложки - матовая или глянцевая; - твердый переплет - картон 2 мм, каптал, белые форзацы, прямой корешок - сверхпрочный полимерный клей; - каждая книга упакована в термопленку. Каждый заказ обрабатывается в индивидуальном порядке: каждой книге, напечатанной по технологии Print-on-Demand, присваивается уникальный номер.