Wikipedia
HISWA
The voluntary association HISWA is an industry trade group for the Netherlands water sports business. HISWA is famous for a twice-yearly organized consumer trade show for the water sports public.
Since 1933 these trade shows have been held at the start of the water sports season in Amsterdam at the RAI convention center and near the end of the season at the HISWA te water (HISWA in water) in IJmuiden yacht harbor.