Although the winter navigation season was officially launched on December 1, ice class restrictions have not been imposed yet, the source said.
"If the forecast for the increase in the ice cover" proves correct, ice-class requirements will be introduced as of December 20, the source said.
Likewise no ice-class restrictions have been introduced at the St Petersburg port also on the Baltic Sea "although we are having very cold weather", a source said, adding that it was not clear when the restrictions will be introduced.