Siku 1:1000 Silja Symphony Cruise LinerHigh quality, German designed SIKU 1: 1000 Silja Symphony Cruise Liner. Since 1991, the Tallink Cruises ferry has mostly travelled on the Helsinki Mariehamn Stockholm route in the Baltic. When commissioned, the Silja Symphony, with a length of 203 metres, was the largest cruise ferry in the world, and was the first to have a continuous promenade deck along the entire length of the ship. The imposing ship carries up to 450 cars and 2,852 passengers,