The Boat

The boat was a huge project led by Two Bread Tom after the Mushroom War in order to migrate humans from land to avoid threatening Vampires. It was first seen in a flashback in the Stakes! Episode "Everything Stays," where it was still undergoing construction and was also used as a camp for the human tribe. Vampires managed to attack the boat and the human's but Marceline fought back and killed them all.

In "Vamps About," the boat was also seen in a flashback, completed and out in the sea as Marceline and The Vampire King battled on it's decks. The episode also showed how the human tribe took refuge and shelter beneath the decks.

Appearance
The boat is huge and appears to look like a huge crusie ship constructed together by remaining parts left over pre-Mushroom War. The boat's exterior red and dark blue paint over it (a red top and bottom with a long and fat stretch of dark blue in the middle.) It also has patches of red metallic pieces possibly to fix and damages that could have been made during the Mushroom War to this boat. The exterior shows slight cuts and damages including holes, meaning that this boat was probably found and reused by Tom to fix and evacuate humans. On it's decks contains, long poles connected with rope lines and a small building which was possibly used as a reception area before the Mushroom War when the boat was possibly used for tourist cruises. At the backside of the deck is another small building with a smokestack on top. The decked floors are wooden and were platformed as well. At the side of the decks, the ropes from the pole connect and small wooden safety boats are tied up.

Trivia

 * The remaining humans leaving Ooo on a ship could possibly give credibility to Martin's story on how Finn was born in the middle of the ocean.