A few weeks ago, I was on the overnight ferry from Hull to Rotterdam. I have often used it and have even come to befriend some of the crew.
There is always an apology that the ferry will depart late but the assurance that all lost time will be made up. I have to admit that they keep their promise.
Nevertheless, upon boarding, there is the knowledge that the trip will take 15 hours. It takes 20 minutes to look at my cabin, go round the duty-free shop, visit each of the three decks and look at the menu (which is the same as the last visit and always very good!).