Meet the remarkable mechanism at Staithes Museum that celebrates John Harrison’s quest to solve one of the great challenges of seafaring: how do you know exactly where you are when all you can see is sea? There is something wonderfully satisfying about the Devon Sea Clock at Staithes Museum. With its brass gears, swinging arms, intricate framework and three separate dials, it looks as though somebody has taken a clock apart and then decided to leave all the interesting bits o