...this could help explain why the "J" (or "L") shapped foils would be an advantage. The lifting portion of the foil will be located deeper below the cycling flow of the wave.
It is likely that this is part of the rationale for using submersed foils instead of surface piercing foils - inverted T or L fois should be more effective to avoid the effect of smaller waves. The other reason I know is ventilation.
However, no foil can avoid the effects of big waves and an offshore foiler requires a solution that doesn't depend on avoiding waves or their effects. It has to keep working with them. A big challenge.
