⏱️ John Harrison's Marine Timekeepers
Revolutionary clocks that solved longitude and reshaped navigation
📋 Fast Facts
- 18th-century mechanical timekeepers that solved the longitude problem at sea
- Developed by self-taught English horologist John Harrison over two decades
- H4 chronometer, completed in the 1750s, was the breakthrough solution
- Original instruments preserved and exhibited at the Royal Observatory, Greenwich, London
John Harrison's marine timekeepers represent a landmark achievement in horology and navigation. These precision mechanical clocks and chronometers ...