The Inter 18 was around before F18 was born. It just happens to fit the F18 box rule. The I18 is probably not as optimized an F18 but it is a pretty solid boat.
I believe that was the Dart Hawk and it was the design that partly inspired the F18 class. The nacra Inter 18 however was designed to the F18 rules, then still young and exclusively in EU, much like the Hobie Tiger (1995). Initially the F18 class wasmade up by the Alado F18 (became Tiger later), Dart Hawk and some Mattia design.
Ohh, I see others had already reacted to these claims. Sorry.
Wouter
