With regard to the article on the Stingray tidal power generator and subsequent letters on the subject, the fluctuations of power output could probably be removed by grouping the units for generation purposes.
A wave is a travelling energy source and while the peak to trough is not necessarily constant, surely it is not beyond the wit of mortal man to space the units along the seabed so that the generation output of the group is tolerably even. One unit will peak while another is at the low point of the generation cycle as the wave moves.
A line of units whose axis is inclined to the general line of advance of the waves seems to suggest itself. As engineers we need to work with nature, not against it.
Oliver Bailey (F), Mornington Avenue, London W14 8UW