Navigation History, Application and Fun with the Sun
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About this ebook
While working through the details it became clear that NAVIGATION HISTORY would not only be interesting and helpful, but would also tie everything together. I have been obsessed with the early Portuguese navigators and how their pilots managed obtain positions, ever since I sat alone in the cockpit, out on the high seas. Inside this manuscript are revealed the secret methods, “STATE SECRETS”, that they used to locate themselves, far beyond any reference from land.
As an additional topic of interest, I have provided the reader with detailed instructions, that describe how to create a sundial, which mounts on a birdbath. This amazing device is not only able to keep accurate time, but also allows the builder to track and record the annual figure 8 ANALEEMA.
James B. Read
Read is a curious retired engineer, always seeking to understand this world. He has been obsessed with the early navigators, the instruments they used, and how they mysteriously managed to find their way on the high seas, far from any land. In addition, he has developed innovative ways to help others understand the art and science of offshore navigation. Beyond this, he has created a birdbath mounted sundial that not only keeps accurate time, but allows the owner to record the figure 8 analemma and other celestial events.
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Navigation History, Application and Fun with the Sun - James B. Read
Copyright © 2023 James B. Read.
All rights reserved. No part of this book may be used or reproduced by any means, graphic, electronic, or mechanical, including photocopying, recording, taping or by any information storage retrieval system without the written permission of the author except in the case of brief quotations embodied in critical articles and reviews.
iUniverse
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Because of the dynamic nature of the Internet, any web addresses or links contained in this book may have changed since publication and may no longer be valid. The views expressed in this work are solely those of the author and do not necessarily reflect the views of the publisher, and the publisher hereby disclaims any responsibility for them.
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ISBN: 978-1-6632-4736-0 (sc)
ISBN: 978-1-6632-4737-7 (e)
iUniverse rev. date: 02/03/2023
CONTENTS
Dedication
Acknowledgements
Introduction
Chapter 1Navagation History
Chapter 2Latitude Determination
Chapter 3Longitude Determination
Chapter 4The Noon Sight
Chapter 5Noon Sight In Opposite Hemisphere
Chapter 6Celestial Navagation With Air Almanac, Ho 249
Chapter 7Reconstructed Sight, Venus & Sirius
Chapter 8Sundial----Copperhenge
Definitions
Bibliography
DEDICATION
I dedicate this book to my friend, neighbor and fellow sailor, Eric Moeller
ACKNOWLEDGEMENTS
My thanks first go to my scientist friend, neighbor and fellow sailor, Eric Moeller. What a perfect situation, me, the instructor and Eric, an eager student with a strong desire to acquire the information that I was presenting. Eric kept asking difficult questions as we went through the drawings and manuscript. The result from his feedback required me to restate or clarify many things and add labels to the drawings. The result of his feedback was that in the end, this document was forced to become clearer and more easily understandable. When I was finished, Eric completely comprehended the material.
My thanks also go to my wife Ann, who took the center cover photo and my picture on the back cover.
INTRODUCTION
This book is the result of much frustration. I had a very difficult time with HOW TO
navigation books, particularly the ones that attempted to simplify things with rote memory. I would follow along with the exercises but would then become lost, not knowing where I was, or become unable to make sense of what I was reading. Eventually I was able to construct diagrams which I could easily understand and which greatly simplified things for me. Using my diagrams, things became much clearer. The result is what I believe to be a more understandable presentation. Once you comprehend what I have presented, you will be much more able to understand the more detailed material of the EXPERTS.
During the above process, I realized that a short history of navigation would be both interesting and useful. For details of the early explorers, I refer the reader to my previous book: CURIOSITY, ADVENTURE TRAVEL, EXPLORATION, TRADE, WAR, MURDER
.
Finally, it came to me that creation of a sundial which not only can be set for accurate time, but is also capable of plotting the figure 8 ANALEEMA, would also be useful. It would not just be fun, but would increase the reader’s understanding of the seasons and make further use of the NAUTICAL ALMANAC.
CHAPTER 1
NAVAGATION HISTORY
Prince Henrique of Portugal, directed the world’s first offshore expeditions with the goal of rounding the capes of Africa and reaching India, Japan and the spice Islands. Born Henrique Infante, 1394, he was the third son of King Joao (John). Henry was the recipient of the finest education available and he became an avid reader. His brother had obtained a copy of Rusticello’s IL Millione, a record of Marco Polos amazing travels and adventures. Henry devoured this book, especially Marco Polo’s claims of unlimited gold, spices and other treasures. With virtually no chance of outliving his brothers to become a king himself and, combined with his hatred of Muslims, plus his newly aroused greed, Henry conceived a plan to kill or convert Muslims to Christianity while taking over their trade routes for himself and Portugal.
To develop his master plan and provide a secure site to operate a navigational THINK TANK and or a NAVAGATIONAL SCHOOL, Henry built a secure fortress. The site selection was an easy decision. The limestone cliffs of the Sagres promontory rise vertically, 50 meters above the wild Atlantic. The peninsula is 1,000 meters long and just 200 meters wide where it joins the continent.