Chronometer

Navigation1761John HarrisonEngland

InventorJohn Harrison

Year1761

CategoryNavigation

OriginEngland

About Chronometer

Harrison spent 31 years building clocks accurate enough for longitude calculation. H1 through H4 progressively smaller and more accurate. The Board of Longitude refused to pay the full prize, demanding more tests. He finally received the money at age 80 after intervention by the King.

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