Nautilus (Final Fantasy III)

The Nautilus is a high-speed Saronian airship used to fly against intense winds. It is obtained after defeating the Garuda in Saronia. It is later enchanted to dive underwater. While in this Submarine form, the party can explore the ocean floor and several dungeons that were previously inaccessible. The Nautilus is still available for the party to use after the Invincible is obtained, and is faster than the Invincible, but lacks the healing, shop, and Fat Chocobo benefits.