What is going on with F17?

What does F17 means. Is it an attempt to create a formula class similar than F18 but for unirigs? Or just a confusing (and sale pitch) name for I17's.

We consider inviting F17's for our east coast event along with the F18s but I need first to understand it. Could FX ones race boat for boat with I17? I would like to.

Any information very welcome

Jacques Pierret

SHBCC Race.org