What is "tt-line"

TT-Line is a shipping company based in Lübeck, Germany, which has been providing a ferry service between Travemünde in Schleswig-Holstein and Trelleborg in southern Sweden since 1962. From 1992 on, Rostock is also offered as starting harbor to Trelleborg (until 1997 this service was marketed as TR-Line). In 2007, TT-Line possesses six ferries.

In 1978 TT-Line acquired 50% of Olau Line and purchased the rest of the company in 1979. TT-Line remained the sole owner of Olau Line until the line's closure in 1994.