Sextant

Award–winning author David Barrie explores the history of the Sextant 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 ch...