sextant a young man s daring sea voyage and the men who mapped the world s oceans

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Sextant

Author : David Barrie
ISBN : 9780062279361
Genre : History
File Size : 89. 22 MB
Format : PDF, Kindle
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In the tradition of Dava Sobel's Longitude comes sailing expert David Barrie's compelling and dramatic tale of invention and discovery—an eloquent elegy to one of the most important navigational instruments ever created, and the daring mariners who used it to explore, conquer, and map the world. Since its invention in 1759, a mariner's most prized possession has been the sextant. A navigation tool that measures the angle between a celestial object and the horizon, the sextant allowed sailors to pinpoint their exact location at sea. David Barrie chronicles the sextant's development and shows how it not only saved the lives of navigators in wild and dangerous seas, but played a pivotal role in their ability to map the globe. He synthesizes centuries of seafaring history and the daring sailors who have become legend, including James Cook, Matthew Flinders, Robert Fitz-Roy, Frank Worsley of the Endurance, and Joshua Slocum, the redoubtable old "lunarian" and first single-handed-round-the-world yachtsman. He also recounts his own maiden voyage, and insights gleaned from his experiences as a practiced seaman and navigator. Full of heroism, danger, and excitement, told with an infectious sense of wonder, Sextant offers a new look at a masterful achievement that changed the course of history.

Supernavigators

Author : David Barrie
ISBN : 9781615195381
Genre : Science
File Size : 32. 88 MB
Format : PDF, Mobi
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A globetrotting voyage of discovery celebrating the navigational superpowers of animals—by land, sea, and sky Publisher's note: Supernavigators was published in the UK under the title Incredible Journeys. Animals plainly know where they’re going, but how they get there has remained surprisingly mysterious—until now. In Supernavigators, award-winning author David Barrie catches us up on the cutting-edge science. Here are astounding animals of every stripe: Dung beetles that steer by the light of the Milky Way. Ants and bees that rely on patterns of light invisible to humans. Sea turtles and moths that fi nd their way using Earth’s magnetic field. Humpback whales that swim thousands of miles while holding a rocksteady course. Birds that can locate their nests on a tiny island after crisscrossing an ocean. The age of viewing animals as unthinking drones is over. As Supernavigators makes clear, a stunning array of species command senses and skills—and arguably, types of intelligence—beyond our own. Weaving together interviews with leading animal behaviorists and the groundbreaking discoveries of Nobel Prize–winning scientists, David Barrie reveals these wonders in a whole new light.

Examiner

Author :
ISBN : BSB:BSB10932455
Genre :
File Size : 43. 24 MB
Format : PDF
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