I have never seen anyone hit it realy big on a ship slot machine, but I did see a man hit a few thousand on one in April. A few years ago we were at the Beau Rivage in Biloxi. One aisle over from us we saw a man hit $8.6 million on a dollar machine - biggest jackpot I have ever witnessed.
Last year on our Halloween cruise, I hit a few hundred the first night and put it to the side. We played on our winnings the rest of the cruise and were still up a little bit, towards the end of the cruise. My husband decided to drop a few dollars in a dollar machine and on the second pull, hit $500. That paid for our sail and sign for that trip.