When did john harrison invented the chronometer
John harrison invention.
John Harrison
English clockmaker (1693–1776)
For other people named John Harrison, see John Harrison (disambiguation).
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 how to calculate longitude while at sea.
How did john harrison solve the longitude problem
Harrison's solution revolutionized navigation and greatly increased the safety of long-distance sea travel. The problem he solved had been considered so important following the Scilly naval disaster of 1707 that the British Parliament was offering financial rewards of up to £20,000 (equivalent to £3.97 million in 2025) under the 1714 Longitude Act,[1] though Harrison never received the full reward due to political rivalries.
He presented his first design in 1730, and worked over many years on improved designs, making several advances in time-keeping technology, finally turning to what were called
