I visited Tallinn, Estonia, on business on last week. The distance between Helsinki and Tallinn is mere 80 kilometers and ships that I frequent take two hours each way. And they leave every three hours from both Helsinki and Tallinn, so there is plenty of options.
But not during the last week, as Tallink put one of their ships to docks for repairs. They are bringing a new ship to the route, but it made its maiden voyage on Sunday and I had to be in Tallinn already on Thursday. Maybe it is a slow season now and they can cope with a single ship, departing every six hours.
I needed to be in Tallinn early in the morning and until evening, and the timetables were really bad. So I decided to take a slower ship and spend my night at the ship.