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Longitude rewards (1737 & 1773) Scientific career. Fields. Horology & Carpentry. John Harrison (3 April [ O.S. 24 March] 1693 – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea.
John Harrison (born March 1693, Foulby, Yorkshire, Eng.—died March 24, 1776, London) was an English horologist who invented the first practical marine chronometer, which enabled navigators to compute accurately their longitude at sea.
- The Editors of Encyclopaedia Britannica
Learn how John Harrison, a self-taught carpenter and clock maker, created four remarkable timepieces that helped find the ship's longitude at sea. Discover his challenges, trials, rewards and legacy at Royal Museums Greenwich.
Mar 14, 2023 · Learn how John Harrison invented an accurate marine chronometer that enabled mariners to measure their longitude at sea. Discover the history and challenges of clockmaking and navigation in the 17th and 18th centuries.
- Mark Cartwright
- John Harrison's H5 marine chronometer was accurate to one-third of a second per day.
- Harrison's chronometer was used to keep the time of Greenwich so that mariners could compare with their local time and so calculate their longitudi...
- John Harrison first invented a marine chronometer, the H1, in 1735. His last and most accurate chronometer, H5, was made in 1770 and tested in 1772.
The first true chronometer was the life work of one man, John Harrison, spanning 31 years of persistent experimentation and testing that revolutionized naval (and later aerial) navigation. The term chronometer was coined from the Greek words χρόνος (chronos) (meaning time) and meter (meaning measure).
John Harrison (1693-1776) was a carpenter and watch-maker who invented the marine chronometer, a device that enabled ships to measure longitude at sea. Learn about his life, his challenges, his achievements and his legacy in this biography.
Apr 3, 2018 · Today, on what would have been Harrison’s 325th birthday, Google is celebrating the legendary horologist with a special Doodle. John Harrison, (1693-1776). Inventor of the marine...
