Pearl Abyss and Daum Communications at Gamescom. The resulting interview is worth a read, and it mentions that Black Desert will in fact be getting some sort of naval system.
"Yes naval transportation and combat will be present in Black Desert Online," said Daum's Park Yoo Jin. "Players will be able to control boats and ships and depending on the kind of naval unit, there will be the possibility to board it with more than one person."
Pearl Abyss had previously announced that it was adding naval combat at this year's E3, but thus far the systems have not been made available during Black Desert's Korea beta tests.