"What really annoys the kite and windsurfers is that Hydroptere ..."
This goes the other way as well the kite and windsurfers most often sail in water that often only inches deep.
I don't think that Hydroptere would brake any records on a tidal flat when the tide is in and the water is 12' deep. Did it go un-noticed that their record was set in conditions that included 5' waves.