We took a cHavana cruise on dec 2018 starting and ending in Havana. As the trip included new-years eve it was very expensive. As we entered the ship we immediately understood that it was a big mistake - you will see why:
The ondoarding process is all on paper, No sea-pass or Card that is actiavted once you are registered. That has to be done on a Kiosk - so you have to queueu.