Electrical plug adapters on Rhine river cruise?

[GSLand]

Do the cabins on the Rhine river cruise ships have American type electrical outlets - or do I need to being an adapter? If so, which type?
Never too early to start packing!

 

[OhanaCuz]

There's one electric outlet behind the Mac that you can plug a USA plug into. The rest in the room are European two pin outlets. The Danube ship had USB ports by the bed.

This is the adapter I brought and it worked great. Just make sure anything that you plug into it is dual voltage because it is not a converter.

http://a.co/dudBHeF