hull form evolution

[Cheesy]

Even if this is considered a monohull I get the impression that the hollows will not be looked upon very favourably by a rating rule?

[Petros]

If it gives any significant advantage, you can be sure the rules committee will revise the rules to disallow it for next season.

Where do you draw the line between mono-hull and multi? It is just a matter of degree, and the rule can be altered accordingly at any time.