“Inherently interesting and fun to read . . . provides the clearest understanding of general navigation principles we've seen yet.”--BoatU.S.
“Thorough and authoritative.”--Sea Kayaker
“A definitive work of instant appeal to seamen of all levels of experience.”--The Navigation Foundation
Every sailor knows that instruments can fail. Things get wet, break, fall overboard. Whether you’re safe on your boat or drifting in a life raft, let David Burch show you how to find your way no matter what navigational equipment you have. Often relying on common materials like a small stick, a plastic bottle, even a pair of sunglasses, Burch explains how to make use of all available means--from the ancient skills of Polynesian navigators to the contrails of airliners overhead--to calculate speed, direction, latitude, and longitude and to perform all aspects of piloting and dead reckoning. Learn how toSteer by sun, stars, wind, and swells Estimate current and leeway Improvise your own knotmeter or plumb-bob sextant Find the sun in a fogbank Estimate latitude with a plate and a knotted string And more vital information
The second chapter discusses geological evidence for ice ages – how geologists surmised their existence prior to actual subsurface data that proved the theory. The following two chapters look at ice cores (primarily from Greenland and Antarctica). Chapter 3 discusses how ice core data is processed and Chapter 4 summarizes data obtained from ice cores. Chapter 5 discusses the processing of data obtained from ocean sediments, and summarizes the results, while the following chapter discusses data from other sources, such as "Devil’s Cave."
Chapter 7 summarizes the experimental results from Chapters 4, 5, and 6. It provides the foundation for comparison with theories in later chapters. In a perfect world, this data would be totally separate and disconnected from theory. Unfortunately, as the author shows, dating of much of the data was accomplished by "tuning" to the astronomical theory, which introduces circular reasoning.
Chapter 8 provides a brief overview of the various theories that have been devised to "explain" the patterns of alternating ice ages and interglacials that have occurred over the past three million years. This serves as an introduction to the following three chapters which presents the astronomical theory in its various manifestations,
compare the astronomical theory with data, and then compare other theories with data. Finally, Chapter 12 summarizes what we think we know about ice ages and, more importantly, what we don’t know.
Barefoot Navigator introducesus to a unique take on navigation – using the skills of the ancients and technology-free techniques, we learn how to navigate using the sun, sea, wind and stars, and even the flight patterns of ocean birds.
The first part of this absorbing book recounts a colourful history of seafarers and their navigation techniques. How did the Polynesians manage to populate an area of ocean larger than North America simply by analysing clouds,currents and wind direction? How did the Vikings routinely travel on the notorious stretches of water between Iceland, Greenland and Scandinavia? The second part shows how to use these ancient techniques to supplement today's navigational hardware, especially in survival situations.
Fascinating history, useful advice, enjoyable writing, and different to every other navigation reference out there, this second edition has been beautifully packaged in a hardback format, with new illustrations and thoroughly revised text.
Numerical Models of Oceans and Oceanic Processes is a survey of the current state of knowledge in this field. It brings together a discussion of salient oceanic dynamics and processes, numerical solution methods, and ocean models to provide a comprehensive treatment of the topic. Starting with elementary concepts in ocean dynamics, it deals with equatorial, mid-latitude, high latitude, and coastal dynamics from the perspective of a modeler. A comprehensive and up-to-date chapter on tides is also included. This is followed by a discussion of different kinds of numerical ocean models and the pre- and post-processing requirements and techniques. Air-sea and ice-ocean coupled models are described, as well as data assimilation and nowcast/forecasts. Comprehensive appendices on wavelet transforms and empirical orthogonal functions are also included.
This comprehensive and up-to-date survey of the field should be of interest to oceanographers, atmospheric scientists, and climatologists. While some prior knowledge of oceans and numerical modeling is helpful, the book includes an overview of enough elementary material so that along with its companion volume, Small Scale Processes in Geophysical Flows, it should be useful to both students new to the field and practicing professionals.
* Comprehensive and up-to-date review
* Useful for a two-semester (or one-semester on selected topics) graduate level course
* Valuable reference on the topic
* Essential for a better understanding of weather and climate