[quote=Mark Schneider
Catamarans organizations should sell ISAF on a two tier model. The notion is that the F18 class is the perfect entry to high level training platform for ultimately stepping up to the Tornado. It's the same crew weight and skill set PLUS it's accessible to the world's sailors. [/quote]

Spot on. Perhaps also add a smaller cat such as the Hobie Dragoon (3 teir model)

For example

29er to the 49er
420 to the 470