The Clockmaker Who Changed the Ocean

In the 1700s, sailors could cross oceans and still not know exactly where they were east or west. One wrong calculation could send a ship into rocks. Then John Harrison, a self-taught clockmaker, spent decades building sea clocks precise enough to solve the longitude problem. This is the story of H1, H3, H4, the Board of Longitude, and the watch that helped change navigation forever. Sources: Royal Museums Greenwich - Harrison's clocks and the longitude problem: https://www.rmg.co.uk/stories/time/ha... Royal Museums Greenwich - What is longitude?: https://www.rmg.co.uk/stories/time/wh... Royal Museums Greenwich - John Harrison's marine timekeepers: https://www.rmg.co.uk/royal-observato... Historic England - Scilly disaster and the marine chronometer: https://historicengland.org.uk/listin... Encyclopaedia Britannica - John Harrison biography: https://www.britannica.com/biography/... Royal Observatory Greenwich - Transcripts of the Longitude Acts: https://www.royalobservatorygreenwich... Royal Museums Greenwich - Nevil Maskelyne and the lunar method: https://www.rmg.co.uk/stories/time/lo... #JohnHarrison #Longitude #TrueStory #History #OddlyHuman #Navigation #Clockmaking #OceanHistory