So, basically, I've read, and seen, alot of what you can do on this epic map, what I've found so far, by exploring it many times, is:
Horn (button in drivers cabin)
Turn on and off a song (same as above)
Speaker voice (again, same as above)
Sink ship (valve on deck 0)
Rise the floor in the garage (don't know exactly which floor, but in the garage)
Lock the doors to the left (from bow) enginroom (and if you set it on fire, also extinguish it with a button to the right of it...I think)
Set left engineroom on fire
Go up and down with two elevators
Spin the Marry-Go-Around (and die from it if uncautious)
Turn on and off the stereo in the danceplace

So, this is what I've found so far, but, Im very eager to know if I've missed out on something!

I heard there's an easteregg somewhere on the ship (or two or three or four) but I haven't found ANYTHING! (What I know)

So please, anyone who have explored enough to know, shear it with us.

I've, as I said, explored the ship several times, with and without noclip and nothing....I can't find anything.

So, if YOU have found anything NOT on this list, tell us, or me, as we, or I, really want to know.
Like, how to find it, where it is etc etc.

Thanx.

P.S Im swedish, so if there's any misspelling and or bad grammar, you now know why.