I thought it was expensive to use roaming not their WIFI??
wifi on the boat is free for 90 mins per day, so you can have a free browse in the bar in the evening and another with breakfast. There are pay options for more wifi.
It is relatively expensive to use roaming using the marine cellphone connection, whether call, text or data.
Roaming in the EU is not expensive, especially if you have it included in your SIM package from virtual networks like Smarty or Lebara.
I download a few podcasts on BBC Sounds & Spotify