Be careful
I've seen 8D H17 games primarily. However, there are many stories of cheating by ship casinos shorting the deck (removing tens and aces) giving them a significantly higher advantage. There is no recourse, as there is no governing Gaming Authority at sea.
If you're a counter, count down at least 10 shoes before you consider playing. If most end in a plus count, stay far away. If you're not a counter, just count the actual TJQK and A cards you see. There should be, on average, 16 TJQK and 4 Aces per deck. So, if they deal 6 decks when the cut card comes out, you should have seen 96 TJKQ's and 24 Aces. If you see significantly less, shoe after shoe, don't play.