The MS Deutschland made it into the Guiness book of world records last year.
This year on Oct 5th Deilmann made another water ski experiment: The river cruise ship MS Heidelberg "towed" 33 water skiers for 18 minutes (3.8 km) on the Mosel river. Another world record. They started out with 44 skiers. After 30 seconds the ship had enough speed to get the skiers out of the water. 33 arrived standing. BTW shortly prior to the finish line (a bridge) they made a pyramid.
See here http://www.kossel-kommunikation.de/a...ail.php?id=176
(sorry, the text is German).