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1 results

  • The Revolution in Tidal Science

  • Paul Hughes
  • Journal:
    The Journal of Navigation / Volume 59 / Issue 3 / September 2006
    Published online by Cambridge University Press:
    23 August 2006, pp. 445-459
    Print publication:
    September 2006

  • Exact tidal study extends back to a fourteenth century record containing sexagesimal times. Earlier commentators have taken these times to be high water. This study shows they are for the later moment of when the flood ends; and, that eighteenth and nineteenth century elevation measurements formed a completely different way of considering the tide, leading directly to reliable predictions. The result shows the Thames tide to have been more consistent than previously stated; and consequently the actual change more accelerated. Therefore tidal current predictions are shown to have a longer history than have water surface elevation levels.