Old-Time Nautical Instruments (Classic Reprint)

Save £0.36

Title: Hardback
Sale price£21.23 Regular price£21.59


Excerpt from Old-Time Nautical Instruments

Based on this instrument, by laying out the circle on a table, John Davis, the explorer, devised his quadrant in 1586. At first the observer used it by facing the sun, as the cross-staff had been used, but a better form was made later where the observer had the sun at his back. This instrument has been called by sailors jackass quad rant and, supposedly from its shape, hog yoke. In early books on navi gation it is called sea quadrant. The earlier form used by the observer standing back to the sun had a solid shade vane which slid along the smaller arc of the instrument. By adjusting this a little short of the sup posed altitude oi the sun and sighting the horizon through the minute hole in the sight vane until it was seen.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This 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.


Publisher - Forgotten Books

Language - English

Author(s) - John Robinson


Published Date - August 25 2019

ISBN - 9780266186045

Dimesions - 22.9 x 15.2 x 0.4 cm

Page Count - 19

Payment & Security

American Express Apple Pay Google Pay Maestro Mastercard Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like

Recently viewed