Earlier someone mentioned the figures $5,000 to $6,000 per metre. I won't do the calculation, but that amounts to some serious money. I think the valuation would be based on that.
We also have to consider the need to take action on erosion. Lowering the speed limit for boats helped reduce erosion by 50%. If the speed limit for ships were reassessed, perhaps that would be a way to reduce erosion further and to ensure that certain sites are less affected by ship and boat wake. In the long term, certain segments would probably no longer be affected by wake, or else its impact would be minimal. That's a potential intervention strategy instead of establishing structures that would be quite costly, as we've seen.