See https://en.wikipedia.org/wiki/History_of_longitude#Government_initiatives https://en.wikipedia.org/wiki/History_of_longitude#Governmen... John Harrison inv

See https://en.wikipedia.org/wiki/History_of_longitude#Government_initiatives https://en.wikipedia.org/wiki/History_of_longitude#Governmen... John Harrison invented very stable clocks that could be used on an unstable platform to solve the problem.