Not that it matters, but at the 2006 open Tornado nationals in Sweden (which had participants from Sweden, Norway and Denmark), we shared the start and course with the F-18s. No problem, just more boats on the start and the course. Great for socializing on shore.
We drove for 15 hours to get there, and ripped a Gran Segel spi, so it was pretty expensive. Did not matter tough..

Scoring was of course separate.