Wouter- The movie/TV industry calls this "Product Placement", and if the product is to be stupidly abused as in JAWS you choose dead boats like a Sizzler and a Sol Cat.

So was there a diabolical Dutchman with a scuba tank and a rubber back fin hired to liven up the pond movie? (We cannot do this in the USA any more because of loss of freedom due to the #%^&* lawyers). But Product Placement is alive and well, and has a long history. If you ever see old black and white US cinemas of the 1930s, everyone was continuously lighting up cigarettes. This new product- coffin nails- were pushed into popularity by the movie industries, and then World War II by the tobacco industry who hooked a generation of American GIs when they were busy liberating Holland and France.