Nautilus is the name of several submarines and submersibles. They are named after the nautilus.
Military subs , a French First Republic sub designed by Fulton, considered the first practical sub (1800–1802) , a French Navy sub, a (1927–1947) , a UK Royal Navy sub, the largest RN sub at service entry (1914–1922) , a U.S. Navy sub, a (1930–1945) , a prototype U.S. Navy sub, the first nuclear submarine (1954–1980)
Civilian subs , a former U.S. Navy submarine, a O-class submarine (1917–1931) , a Danish civilian home-built sub, part of a 2017 murder case (2009–2018)
Fictional subs , a fictional submarine created by Jules Verne. Found in the novels Twenty Thousand Leagues Under the Seas (1870) and The Mysterious Island (1874)
See also List of ships named Nautilus Nautilus (disambiguation)