- Are there portholes in the cabines on the lower deck?

Yes, there are but without sea view since they are a little bit around the corner.

Fresh air supply is absolutely sufficent.

- Is it possible to put a third bed in the cabine for our child?

Yes, if required, smaller children can stay ith their parents.

- Is there always electricity available on the ship?

While driving, filling bottles and staying at a port we have got 230V.  

If we stay in a bay overnight, the generator will run until 10 p.m.