You are Peter and on this rock I will build MY church and the gates of hell shall NOT prevail against it. - Matthew 16:18
My wife runs Catholic-oriented cruises. Costa is based in Italy, and always has a priest. I think Holland America ships always have one, and Celebrity usually does. On occasion my wife has booked a priest from our diocese to come with the group. She's doing that later this year on a 7-day cruise leaving New Orleans after Christmas.BTW, at least for US ships, the Apostleship of the Sea approves all the priests as being genuine. There have been occasions of former priests or lay people faking it on cruise ships.