Nautilus is a slender spindle-shaped submarine powered by electricity, and its captain is Nemo. It is 90 meters long and 7 meters wide and has good navigation performance. The maximum speed can reach 50 knots. The power to drive it is obtained from the submarine coal mine; The food on board is fish, seaweed, etc. Therefore, this kind of energy and necessities come from the sea, without land supply, and can sail indefinitely at sea. Nautilus has a huge compressed air storage cabinet inside, which can sneak under the sea for months. The interior is spacious and comfortable, with living room, dining room and even library and museum. Its combat effectiveness is also very high. With its high speed and solid shell, the ship can be directly knocked out of a big hole. The stories of "I" (Pierre Aronnax), Conseil, my servant, Ned Land of the whaling ship, and Nemo, the owner of this submarine, all revolve around it.