The Skippers of the Cameleon

Hielke and Sietse Klinkhamer (Koen van der Donk and Jos van der Donk) are identical twin boys who come into a boat of their own through a stroke of luck. The boat, a pusher called De Kameleon, turns out to be very fast, and the brothers put it to work helping their friends. Steven de Jong and Marc Willard follow the twins as they take on a growing run of jobs, and the boys carry every one of them out together.