Checking in: I've mostly mapped out the ship, which will probably be as big as a galleon after all. I think I'll include descriptions of each room in the first post of the OOC as they're explored IC, and group everyone by which room they're in. Three groups of five to start, each group will wake up in a different room.

How this is going to work: There are no NPCs (that you know of) onboard. Interact with the environment to make things happen. Discover information and potential tools/keys/potions/magic thingamabobs that might help you later. Interact with your fellow characters. Every little thing your character does has a chance of drastically affecting everything and everyone else. Doing nothing does nothing.

Now, it's just a matter of writing the first post.