wireless on a cruise (Tallink)

The Stockholm-Tallinn cruise line Tallink has free wireless Internet, I don't know if it's on all the ships but it is on the Romantika.  Not available in the cabins AFAIK, but works fine in the 6th and 7th floor lounge areas next to the outer deck.  Must be satellite, as it works while the ship is sailing.  A bit slow but certainly usable (I'm using it right now).