[DOWNLOAD] "Sextants at Greenwich" by W.F.J. Mörzer Bruyns & Richard Dunn ~ eBook PDF Kindle ePub Free

eBook details

Title: Sextants at Greenwich
Author : W.F.J. Mörzer Bruyns & Richard Dunn
Release Date : January 25, 2009
Genre: Science & Nature,Books,Professional & Technical,Astronomy,History,
Pages : * pages
Size : 61723 KB

Description

This book describes the history and development of navigating instruments. Before satellites these were used to measure the altitude of the sun and stars above the horizon, to determine the ship's position at sea. The book also contains a catalogue of 347 mariner's astrolabes, cross-staffs, backstaffs, and octants, sextants and artificial horizons.