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A Sextant, 1912

A Sextant, 1912


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A Sextant, 1912

Illustration of a typical sextant, c.1912. Sextants are used by mariners and explorers to determine their position, by measuring the angle between the horizon and the sun. Date: 1912

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Media ID 7217249

© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10217869

Angle C1912 Determine Explorers Horizon Mariners Measuring Position Sextant Typical Sextants


EDITORS COMMENTS
A Sextant, 1912: Navigating the High Seas with Precision This illustration showcases a typical sextant from the year 1912, an essential tool for mariners and explorers during the age of sail and early steamships. Sextants were indispensable for determining a ship's position at sea, allowing navigators to calculate their latitude by measuring the angle between the sun, the horizon, and their current location. The intricate design of the sextant is illustrated here, with the sun represented by a small circle at the top of the instrument. The horizon is depicted as a flat line at the bottom, while the user's perspective is represented by the curved sighting tube in the center. The sextant's arms, marked with degrees, extend from the body of the instrument, allowing the user to adjust the angle of the mirror to reflect the sun's image onto the sighting tube. By aligning the sun's image with the mark on the arm corresponding to the observed altitude, navigators could calculate their latitude and, with the help of a chart, determine their approximate position at sea. This process, known as celestial navigation, was crucial for long voyages when other methods of positioning, such as GPS, were not yet available. The sextant, with its rich history and enduring significance, remains a fascinating symbol of human ingenuity and the spirit of exploration. This illustration, captured in 1912, offers a glimpse into the past and the remarkable feats of navigation that have shaped our understanding of the world.

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