A DVD (digital versatile disc) can hold 120 minutes of film material or just under 5 MB of data volume. That's why DVDs are so interesting in our industry, because they convey compact information in a way that can be played over and over again, without having to have access to the Internet. Learning programs help to better maneuvers in sailing or knots and splices. For the sport boat driving licenses inland, sailing and motor, DVDs convey the entire learning material. The company Delius Klasing (sport boat chart manufacturer) offers annual licenses of digital chart sets, for example the sport boat chart set 2 for Mecklenburg-Vorpommern, usable for Mac as well as for PC. Digitized were the also German inland waterways, which are available in the editions 1-3 not only in paper form, but also electronically.