Scotland was big, at one point, on using sea-power. Their idea was more about using the rising/falling/tidal energy to generate electricity via motion: https

Scotland was big, at one point, on using sea-power. Their idea was more about using the rising/falling/tidal energy to generate electricity via motion: https://en.wikipedia.org/wiki/Pelamis_Wave_Energy_Converter https://en.wikipedia.org/wiki/Pelamis_Wave_Energy_Converter