>(this train goes on the ferry)

Wow, how does a train go on a ferry? A full, long train with many cars? Then the ferry would have to be that long too, which seems unlikely. Or is it that one or a few cars of the train go on each trip of the ferry, and the cars are all connected back together when back on land?

The Denmark-Germany ferries on that route are ~150 m long, and fit a train of up to 100 m length (or something in that ballpark).

https://de.wikipedia.org/wiki/Datei:2017-08-22-ICE_TD_Puttga...

Larger ferries on other routes have multiple rails next to each other, and long trains are split up across those.

>The Denmark-Germany ferries on that route are ~150 m long, and fit a train of up to 100 m length (or something in that ballpark).

Whew!

>https://de.wikipedia.org/wiki/Datei:2017-08-22-ICE_TD_Puttga....

High-tech.

>Larger ferries on other routes have multiple rails next to each other, and long trains are split up across those.

Great idea.

Or low-tech -- the first train ferries like this ran in 1842.

As the Wikipedia article says, there are very few routes left in Europe, although there used to be a lot.

https://en.wikipedia.org/wiki/Train_ferry

Interesting, didn't know. It felt like high-tech to me, anyway, since I had not seen or heard of train ferries before, although I did know about ferries that can take cars (automobiles) on board. Been on one such ferry in Goa, and my parents had been on some while visiting the US and Canada, I forget in which city.

There's some rail replacement service in some of the offered routes, I assume that's why it's not only one change.