TV Movie | | Drama, History
In two parallel stories, the clockmaker John Harrison builds the marine chronometer for safe navigation at sea in the 18th Century and the horologist Rupert Gould becomes obsessed with restoring it in the 20th Century.
Taking that into account, there's a possible error in the longitude of less than half a degree.
Captain Bourke: Let me be the first to congratulate you.
William Harrison: No, thank you. I'm already drunk. All my life -- my father's life -- has been for this moment. Listen: if the ...
Harrison describes his clock to George Graham, and the accuracy astounds him. In reality, Harrison invented the "gridiron pendulum" (which made such accuracy possible) in 1726. However, Graham had invented the even more accurate "mercury pendulum" in 1721, so he would not have stated such accuracy "can't be done", when first meeting Harrison in 1730.
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