John Harrison's Marine Chronometers
The handiwork of an underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

📜 John Harrison's revolutionary marine chronometers, H1-H4, are displayed at the Royal Observatory in Greenwich.
🔍 These timepieces solved the 18th-century "longitude problem" and transformed seafaring.

Why Go

🕰️ Witness historically significant clocks and engineering marvels🧠 Learn about navigational challenges, their solution, and John Harrison's 46-year quest⚓ Explore British naval history and understand their impact on global exploration📍 Visit the Royal Observatory, home of the Prime Meridian👀 See H1-H3 still ticking after 250 years

Tips

🚇 Easily accessible via Cutty Sark DLR, local buses, Greenwich Pier, and Greenwich/Maze Hill stations.

Last updated 1 day ago

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