Bruyns W.F.J.Morzer, Dunn Richard:
Sextants At Greenwich
A Catalogue Of The Mariner's Quadrants, Mariner's Astrolabes, Cross-Staffs, Backstaffs, Octants, Sextants, Quintants, Reflecting Circles And Artificial Horizons In The National Maritime Museum, Greenw
Oxford University Press (United Kingdom), 2009
Hardback, 336 pages
Size: 315x240 mm
ISBN: 9780199532544
ISBN-10: 0199532540
Sextants At Greenwich
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.

