We do mixed fleet racing so yes, the monos & multis do physically race together, same course and same start, but the results are separated for scoring and awards purposes. I have all but begged for separate starts in the last few years as it is very difficult to "mix it up" on the starting line as we have everything from the SunFish to Acats skippered by a wide spectrum of skill levels.
We use the Portsmouth handicap numbers as posted by US Sailing for scoring.
-- Hobie 16 (3 formerly)
MacGregor 25 (formerly)
Chrysler Dagger 14 (formerly)
NACRA 5.0 (currently)
High Point, NC --