2023-05-18 Dutch Youth Regatta (DYR) 2023 – ONK Optimist + ONK Optimist Benjamin Dutch Youth Regatta (DYR) 2023 – ONK Optimist + ONK Optimist Benjamin 18 mei, 2023 - 21 mei, 2023 Dutch Youth Regatta (DYR) 2023 – ONK Optimist + ONK Optimist Benjamin