For those who really want to know what is meant with a CE certificate, you can read here the official
"RECREATIONAL CRAFT DIRECTIVE AND COMMENTS
TO THE DIRECTIVE COMBINED"
http://ec.europa.eu/enterprise/maritime/maritime_regulatory/doc/guide_v2_94_25_en.pdf

A boat raced at the GC event has to comply with category "C"

C. INSHORE: Designed for voyages in
coastal waters, large bays, estuaries, lakes
and rivers where conditions up to, and
including, wind force 6 and significant wave
heights up to, and including, 2 m may be
experienced.