Pirates of Dark Water

[Aldarc]

Probably as a fortress that just happens to be seaworthy.

 

[DnDChick]

Despite being scary-looking, there really wasn't all that much special about the Maelstrom. It was big, had a water-tight pit for the Constrictus, and it's prow could open like a mouth to allow access to the lower hold.

 

[phindar]

I saw the deck plans. Very awesome.