As has been established, Space Is an Ocean, and in fiction, naval and maritime terms are often applied to spaceships. Some works, however, take things further, and make their characters go Space Sailing on literal ships IN SPACE! The reason for this? The Rule of Cool, and nothing else. While, in Real Life, there are proposals for spacecraft with solar sails, that's a different concept. Those would be spacecraft-with-sails but otherwise designed like any other spacecraft; these are literal oceangoing-type boats in space, with all the shape and features that implies. A subtrope of this is the idea of a space Titanic, an oddly common meme. They are invariably doomed. Interestingly, Space Ships don't go after Space Whales as often as you might think. They are quite likely to house Space Pirates, though.
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Anime and Manga
- Particularly abundant in the Leijiverse—the anachronistic vehicles are partially what give the shows their charm.
- The anime Nadia: The Secret of Blue Water has none other than Captain Nemo take a Yamato-esque New Nautilus into space to battle a gigantic Atlantaean Flying Saucer named Red Noah. The scene in which the New Nautilus first breaks free of the ground it is imprisoned in is a direct and clear homage to the similar scene in the aforementioned Yamato.
- The anime Odin: Photon Space Sailor Starlight begins with a scene showing lots of futuristic ships plying the spaceways — then brings on its master stroke, a new, better space ship, which is... a wooden sailing ship, complete with decks and rigging and masts and such.
- Space Carrier Blue Noah, a.k.a. Thundersub.
- The Hyper Galaxy Dai-Gurren from Tengen Toppa Gurren Lagann looks much like a HUGE aircraft carrier.
- Had Toei Animation accepted the Toon Makers bid for remaking Sailor Moon (in the infamous "Saban Moon"), instead of DiC's dubbing, Americans would have gotten the Sailor Senshi battling evil by going sailing in space... on space-windsurfers... involving fights with such ships.
- Sol Bianca revolves around a space "submarine", which "dives" and "surfaces" to enter and leave its cloaking effect.
- Crossbone Gundam has the Mother Vanguard, which has broadside beam cannons, a sail that mounts more cannon plus missiles and a high-speed flight system, and a masthead statue of a woman made of gold. This fits with the series' general pirate aesthetic, even if the ship was built before the heroes decided to become Space Pirates.
- The Fhloston Paradise hotel in The Fifth Element actually does double as both a space and a (hovering-just-above-the-) sea vessel. It looks like a futuristic version of a steam paddle boat. The steam-stacks, however, may be just for show — it is a luxury toy meant for the amusement of rich tourists, after all.
- In the movie version of Brave Starr, Bravestarr and JB travel on a spaceship with sails, which has leather couches, huge picture windows, and shelves of paper books.
- There is a B-Movie called Message from Space, which has this very thing, but takes it to the extreme. These space sailors are wooden Renaissance-era ships! Oh, and it also includes Humongous Mecha, Planet Looters, Space Pirates, and even a planet with rocket engines! Also has a musket-toting droid.
- Disney's Treasure Planet takes this to the extreme, with a 70/30 blend of 18th century ships combined with technology. It works quite well.
- WALL•E featured the Axiom, a "Starliner" with a design evoking that of a sea-going cruise ship.
- In John Ringo and Travis S. Taylor's Into the Looking Glass series, the Human-Adar Alliance's first warp ship is a converted Ohio class ballistic missile submarine, the USS Nebraska (SSBN-739), and is mostly crewed by US Navy personnel who primarily use naval terminology except where the third dimension is involved.
- In Philip Reeve's Larklight novels, the star ships are nothing more than Victorian sailing vessels with alchemical engines.
- In Leo Frankowski's The Two Space War, Hyperspace is literally two dimensional, and spaceships are sailing ships made of wood infested with an alien fungus.
- A follow-on novella to David Drake's Ranks of Bronze, "Delenda Est Carthago" by Eric Flint features the newly created space navy of Terra, based on stolen technology brought back to 21st century Earth by the survivors of Crassus' Roman legions. Said technology included a warp drive and Deflector Shields which would also work to keep the air in, resulting in humanity's first space fleet consisting of converted submarines, frigates, carriers and battleships, pulled from the waves and into space. The battleship Missouri's part of the action was particularly reminiscent of Uchuu Senkan Yamato. There was, however, one ship included in honour of the returned Romans: a restored Roman galley. The fleet commander was constantly infuriated by the fact the galley's crew were still rowing.
- David Drake also has the RCN series where the ships maneuver through a hyperspace with sails.
- In The Book of the New Sun, the spaceships of the Hierodules are described in terms almost identical to nautical vessels, with decks, sails, and rigging. They are almost certainly not supposed to look like nautical ships (for example, Tzadkiel's ship has a series of decks all around the ship, rather than deck, sides and keel) but the reader must struggle to escape that impression given Severian's habit of not drawing distinction between nautical and space-going ships.
- Michael J. Martinez's  is set in an Alternate History where an alchemical invention made in the late 15th century allows ordinary sailing ships to fly through space. The story follows the adventures of an 18th century British naval officer who is employed on a perfectly ordinary wooden, sail-driven frigate — that happens to be en route to the planet Jupiter.
- Although regular spaceships are also seen, the pirates in Mark Delewen And The Space Pirates use 18th century style ships.
Live Action TV
- Doctor Who has not only the new series Christmas Episode "Voyage of the Damned", one of the aforementioned Space Titanics, but also the 1983 Fifth Doctor serial "Enlightenment", where he and his companions find themselves on board a Sufficiently Advanced Alien Edwardian ship in space, powered via solar sails, which is participating in a race around the planets, along with other such ships from different periods from human history, including a Greek trireme...with rowers.
- Voyage of the Damned could be justified, though, since the aliens purposely made it to look like the Titanic, and many other spaceships in the series look nothing like boats. In other words, it doesn't look like a boat because space is an ocean, it looks like a boat because they wanted it to. The aliens, that is, not just the script writers.
- Star Fleet gives us the Skull, a space going pirate ship complete with sails.
- Gokai Galleon from Kaizoku Sentai Gokaiger, the Space Pirates Super Sentai. It's the Red Ranger's mech, the central piece to the Combining Mecha, and transportation (with pretty nice living quarters) for the entire team.
- Commander Sisko from Star Trek: Deep Space Nine built a lightship that employed a solar sail for propulsion - Bajorans had even traveled faster than light with these contraptions.
- This was the whole point of the Dungeons & Dragons Spelljammer setting. In this case, it wasn't interstellar space so much as interplanar space. Somewhat justified in that the whole thing is done by magic. Also, sails only provide maneuverability — conventional means of propulsion has the same performance when strapped on almost any object of acceptable size.
- The Eldar of Warhammer 40,000's ships use solar sails for propulsion, which means that if you play as them in the space combat spin-off, Battlefleet Gothic, you'll have to keep track of which side of the table is sunward and adjust your movement rates accordingly.
- In the regular 40k, Dark Eldar skimmers fit the trope to a T. Especially fifth edition ones released in November 2011.
- GURPS: Spaceships discusses solar sails. You can even give space boats wooden hulls if the setting demands it or the characters are incredibly desperate.
- One example is the Star Galleon which uses astral sails to move through space and designed to sail on a normal sea.
- The "Oceans Unmoving" storyline in Sluggy Freelance. This one wasn't space either, but flying sailing ships in a place outside time itself, which sailed above the frozen oceans of the title.
- This one was an interesting variation in that, although the ships' hulls looked like those of sailing ships, they could have masts on the bottom as well with additional sails.
- Oceans in the Sky features, very prominently, a sailing ship capable of space travel as a plot point.
- Grandpa's battleship in Homestuck, though The Medium is not exactly space. The white and black armies have such ships as well.
- In Phoebus Krumm thanks to "S-fields" starships are open-topped sail ships with no electronics on board. Not really any explanation why they're open aside from the field containing the atmosphere, and it seems like a rather bad idea since the field vaporizes organic matter that comes into contact.
- The Douglas Adams game/novel Starship Titanic, one of the aforementioned Space Titanics. This particular ship also got a mention in Life The Universe And Everything.
- The RPG Rogue Galaxy.
- The airships in Super Mario Galaxy? Usually found in the sky, the game has Bowser's airship fleet flying through space in quite a few of the levels, notably Bowser Jr's Airship Armada.
- Vega Strike has Hidalgo. It's a luxury yacht made by Highborn faction, so extra-extra-fancifulness is to be expected. And yes, it's one of Space Pirate ships of choice too.
- At least one freighter model in Tachyon: The Fringe has a strong resemblance to oceangoing ships.
- Sins of a Solar Empire: Some of the TEC's ships are space liners refitted for combat. The Akkan Battlecruiser for one looks like a cruise ship.
- Aetherships in Lusternia allow players to fly through aetherspace. Since aetherships are customized entirely by the player who owns them, they run the gamut from hi-tech spaceships, to airships, to pirate ships, and even floating stately homes!
- In Spore, a space ship can be designed like a boat, jet-ski, submarine, tank, blimp, or a solid cube, and still function the same.
- The 3-2-1 Penguins! episode "Runaway Pride at Lightstation Kilowatt" featured an entire setup of this, with a giant cargo spaceship and a lighthouse-like beacon that was set up on a beach-like asteroid with energy waves floating off of it.
- Codename: Kids Next Door had this when the candy pirates "modified" their ship for space travel (modifications consisted of an air bubble...thing and engines
- Duck Dodgers featured a spaceship designed to look like an eighteenth-century pirate ship assaulting a spaceship designed to look like a nineteenth-century cruise liner. Also, the Klunkian (not Klingon) warship resembles a Viking longship, complete with oars.
- Futurama, the Space Titanic episode "A Flight to Remember". It survived Zapp Brannigan's decision to take it through a field of comets ("Ah, yes, comets, the ice-bergs of the sky!"), but then he had to steer it near "that black-ish, hole-ish thing". Also, a Dark Matter Tanker appears in "The Birdbot of Ice-Catraz" and a Pirate ship at the beginning of "Godfellas".