https://www.government.nl/topics/sailing-and-boating/applying-for-an-inland-shipping-certificate-for-pleasure-crafts
If you intend to sail a large pleasure craft in the Netherlands you usually need a binnenvaartcertificaat (Inland Navigation Certificate).
inland navigationapplyingcertificatepleasurecrafts
https://naval-barging.com/nl/schepen/tankschepen-naval
Overzicht van de vloeibare lading schepen van Naval Inland Navigation
inland navigationdevannaval