The company is one of the industry's leading operators of European river cruises. Its fleet of nine river vessels – one more is under construction – traverse waterways throughout Europe, ranging from Germany and France to Belgium and Bulgaria. Deilmann also has two ships that sail ocean voyages. In addition, Deilmann also owns two ocean-oriented ships. The 50-passenger Lili Marleen, a three-masted barquentine, is one of the industry's most unique vessels. The 513-passenger M.S. Deutschland, introduced in 1998, is the company's first cruise liner.
A company spokeswoman says that the owner's daughters, Hedda and Gisa Deilmann, both of whom have worked at the cruise line in a variety of management positions, will now helm Peter Deilmann Cruises.