Bidspirit auction | ORTIGÃO (António de Macedo Ramalho).

ORTIGÃO (António de Macedo Ramalho). GUIA de Navegação. Lisboa. 1905. - ORTIGÃO (António de Macedo Ramalho) GUIA de Navegação . Lisboa: Imprensa Nacional, 1905. 384 pp.: il.; 250 mm. This astronomical and estimation navigation manual was conceived, in the author's own words, with two purposes: to serve as an ”aide-mémoire” for officers of both the naval and merchant navies, and to assist cadets in studying the 2nd and 5th subjects taught at the Naval Academy. It originated from a notebook of nautical calculations prepared during the course and progressively expanded with explanations and simplifying tables, until it became a complete guide for the person in charge of piloting. The work adopts the Greenwich meridian and the ephemerides from the English nautical almanac, and uses the tables commonly used in the Portuguese navy, those of Norie, Banhos, Fontoura and Martelli. It includes a preface by José de Abreu Barbosa Bacellar, dated Tavira, August 15, 1904, which praises the rigor of the method and the clarity of the exposition, devoid of spectacular language. A work of interest to the history of nautical education and piloting practice in Portugal at the beginning of the 20th century, published by Imprensa Nacional. Curious. ⚑ Auto-translated via Google Translate