Here is something not too many people know -- class 'European Championships' are controlled by Eurosaf in the same way that class 'World Championships' are controlled by ISAF. In both cases, authority is delegated to ISAF-RSD to approve such championships.
Eurosaf wrote:2.4 ISAF Radio Sailing Division may hold one annual European Championship per ISAF-RSD Class up to a maximum of three European Championships.