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7[[quoteright:330:[[WesternAnimation/TreasurePlanet https://static.tvtropes.org/pmwiki/pub/images/treasure_planet_sailing..jpg]]]]
8[[caption-width-right:330:Sail onward, 'till you can't see the event horizon.]]
9
10->''"When ships to sail the void between the stars have been invented there will also be men who come forward to sail those ships."''
11-->-- '''Johannes Kepler'''
12
13Maybe it's the vast expanses, the parallels with navigation, the [[RuleOfRomantic romantic aspects]], maybe it's the sense of adventure and danger, maybe it's the obvious parallels to the Age of Exploration, but for some reason, when people write about space, they tend to make parallels to the sea, as [[UsefulNotes/JohnFKennedy President Kennedy]] (himself a former naval officer) did in his "Space is the new ocean" speech. Often, it goes far beyond metaphor. ScienceFiction writers frequently use nautical analogies for pretty much ''everything'' in space, and fill in the gaps in their own knowledge about spaceflight with details specific to sea travel.
14
15For example...
16* Spacecraft are often called "spaceships", and sometimes just "ships". In many series, a small spacecraft can even be called a "spaceboat" or "boat", and space-based missiles are in some stories also called "torpedoes".
17** Furthermore, the classes of ships in the StandardSciFiFleet are usually [[UsefulNotes/TypesOfNavalShips analogous to classes of waterborne ships, especially those used during World War II: Cruiser, Battleship, Destroyer, Frigate, etc]]. Good luck finding a Space Schooner or Space Canoe -- though they have shown up.
18** Spacecraft even have "lifeboats" -- generally called {{escape pod}}s or something similar -- despite the concept being [[https://web.archive.org/web/20160302191122/http://www.projectrho.com:80/public_html/rocket/advdesign.php#id--Life_Boats largely impractical]] in case of realistic space travel. Though softer sci-fis can {{justif|iedTrope}}y it with advanced technnologies.
19** Some works of fiction [[SpaceSailing blur the line between spaceships and oceangoing vessels even further]].
20* Space is [[TwoDSpace two-dimensional]]. Spacecraft tend to behave like actual ships floating in water, almost always navigating along the horizontal plane and rarely seen in any other orientation other than "upright", unless they are "sunk". Viewscreens are also almost always two-dimensional, when displays for battles at least should be three.
21* Space [[SpaceFriction has friction]].
22* Habitable planets are scattered across the Universe just like islands in a huge unexplored archipelago. Spaceships generally need to stock up supplies and energy on board between travels (some with sufficiently advanced technology just need solar energy to reload batteries though).
23* Planets are the main objective of warfare, just like the dry land was in naval wars. They have multiple uses (resources, strategic location, habitable environment), but they are always the primary target in space, even if said resources would be more abundant in, say, asteroids.
24* Space militaries almost always use [[SpaceNavy naval]] ranks, as opposed to [[UsefulNotes/CommonRanks army ranks or the RAF system]], and soldiers stationed in space are usually called "marines", e.g. the "{{space marine}}s" of ''Film/{{Aliens}}'', ''VideoGame/{{Doom}}'', ''VideoGame/{{Marathon}}'', ''VideoGame/StarCraft'', etc. Some works go all the way to calling Space "Black Water", as opposed to "Blue Water"(Oceans/Seas) and "Brown Water"(Rivers). ''Literature/StarshipTroopers'' did not call its soldiers marines though it could be argued that it established the archetype for later space marine forces. Even in real life, space explorers are called [[http://www.etymonline.com/index.php?term=astronaut&allowed_in_frame=0 "astronauts"]] and "cosmonauts" (see Real Life).
25* Spaceships have a [[TheBridge bridge]] with [[ExposedStarshipBridge a big window in the front that looks out on space]] and is usually at the front or top of the ship. The decks of the spaceship will be parallel to the direction of flight.
26* Spaceships have a very noticeable "top" and "bottom". Cockpits, conning-towers, communication dishes, weapons etc. will mostly be on the "top". The underside will be smoother, often punctuated only by a "bomb-bay" style docking hatch. The top is always oriented with regard to a universal definition of "up" that all space-faring polities seemingly accept. This could be justified for vehicles designed for atmospheric flight and landing, but makes ''no'' sense for orbit-to-deep-space-only ships.
27* Space is [[SpaceWhale chock full of whales]].
28* A spacecraft can be caught in an [[SwirlyEnergyThingy "ion storm"]] or [[NegativeSpaceWedgie the like]], which will toss it hither and thither and ultimately run it aground on a strange exotic uncharted planet. [[note]]Ion storms ''are'' a real phenomenon, but they don't work like ocean storms; an ion storm is simply an unusually intense burst of solar wind.[[/note]]
29* SpaceClouds can hide your ship like an ocean fog.
30* In space, hovering things have to [[MidairBobbing move up and down slightly]].
31* Piloting spacecraft [[AsteroidThicket between asteroids]] is often compared to navigating boats and ships across the waters between rocky islands and islets within an archipelago on Earth.
32
33In SpaceOpera, ScienceFantasy and SteamPunk {{Fantasy}} genres, writers are fond of filling Space with aether streams and solar winds, even magical ships with {{Solar Sail}}s that ''literally'' "sail" through the Void.[[note]]Solar winds and sails are an actual thing. Bill Nye, for one, took part in a program that launched a small craft into space that, once up there, used a solar sail (essentially a large mirror made of mylar) to 'catch' the minuscule pressure imparted by reflected sunlight. Solar winds, streams of electromagnetically charged plasma emitted by stars, provide orders of magnitude less "push" per surface area than the light pressure used by a reflective solar sail, but can also be used for propulsion with very different setups known as electric sails and magnetic sails. Rather than being driven by the impact of particles against physical sheets of material, these use [[DeflectorShields "virtual sails" of electromagnetic field]] generated by large antennae to catch the electromagnetic "push" that drives the solar wind. Prototypes have been successfully tested, and while simple reflective solar sail is simpler and requires no internal power, electromagnetic sail's have numerous advantages including lower weight, higher acceleration, and larger operating ranges from a star.[[/note]] In those cases, you may find you can even [[BatmanCanBreatheInSpace breathe in Space]], and if you're lucky you can even ignore the [[ExplosiveDecompression vacuum.]] Characterization and plot may also come straight out of the archetypes created during the era of WoodenShipsAndIronMen as well -- including intrepid explorers, [[LostColony lost colonies]], [[GreenSkinnedSpaceBabe an exotic beauty in every port]], SpacePirates, and sightings of the majestic SpaceWhale.
34
35To some extent, Space Is An Ocean is a JustifiedTrope: not only was space thought to be some kind of fluid until the turn of The20thCentury[[note]]The fluid was called "luminiferous aether"; physicists knew they couldn't detect it, but thought that they simply did not have the technical skill to do so at the time. We later discovered that the reason aether couldn't be detected is because it doesn't exist. This wasn't because they were stupid back then and couldn't imagine empty space -- it's because they were sure light waves needed a medium (such as air or water) to propagate through, just as sound waves do. As it turns out, light behaves as both wave and particle, making it possible for light to travel through the vacuum of space like any other matter.[[/note]], but seafarers long ago evolved the organizational techniques necessary to safely operate a self-sufficient vessel in a potentially hostile environment for an extended period of time, and it makes more sense to adopt nautical administrative and logistic features (and the terms for them) instead of inventing everything from scratch.
36
37As science fiction (and the aviation industry) has matured, SpaceIsAir has become a complement to Space Is An Ocean. Typically, large ships like TheBattlestar will be based on naval craft, while smaller craft like the SpaceFighter will be treated like aircraft. The two are not mutually exclusive -- far from it, applying the tropes to different vehicles allows writers to recreate UsefulNotes/WorldWarII (particularly the Pacific theater, with its pioneering of large-scale naval aviation) {{Recycled IN SPACE}}, which is pretty cool, as it allows using the tactics of the OldSchoolDogfight and having to close to [[SeeTheWhitesOfTheirEyes broadside range]] with capital ship guns. Land transport metaphors tend to fall flat. Elements of road vehicles are generally PlayedForLaughs; if a spacecraft has a [[DrivingStick manual transmission]], it's a sure sign that RuleOfFunny is a prime consideration. There is, however, a small but generally serious set of aversions (some listed below) that imagine space as a railroad instead -- ranging from literal portrayals of trains in space to plots that take their inspiration from real-life railroad history.
38
39Lots of speculative fiction in all media depict spaceships designed to land on water, since an ocean provides what amounts to an infinite runway with a similarly infinite capacity for absorbing the heat of re-entry. Some examples include the Bebop from ''Anime/CowboyBebop'', the Seeker from David Brin's Startide Rising, most of the Space shuttles in Jerry Pournelle's Literature/CoDominium series, and the actual Apollo spacecraft sent to the moon (as well as the Mercury and Gemini spaceships that preceded Apollo) as well as the [[https://en.wikipedia.org/wiki/Huygens_(spacecraft) Huygens probe]] sent to Titan, Saturn's largest moon[[note]]This one not for that reason, but instead because it was not known if it would land on solid terrain or a (methane) ocean. It found the former[[/note]].
40
41In more realistic takes on this trope, spacecraft may be likened to [[SubStory submarines]] instead of surface ships. There are a number of similarities between the two that make such a comparison useful:
42* Both move in three dimensional space.
43* Prolonged exposure to space (or water...you get it) outside the vessel can be deadly (if the sub is currently at depth).
44* Visual displays of the outside environment are less than useless, and hence submarines and spacecraft tend not to have windows (both space and the briny deep are inky black).
45* Submarines firing torpedoes is a decent analogy to semi-realistic space warships firing missiles.
46* Unfortunately, there are still a few significant points of differentiation: StealthInSpace is much harder than staying undetected underwater, and [[SpaceWhale space whales]], while cool, require some hand waves.
47
48Finally, while not technically TruthInTelevision, this trope may well become so out of sheer cultural inertia; if it didn't become so as soon as NASA started naming space shuttles right out of maritime tradition. There's even a test shuttle named ''[[Franchise/StarTrek Enterprise]]'' (a case of {{Defictionalization}}). There is also the fact that the orbits of most of the planets of UsefulNotes/TheSolarSystem have an inclination of plus-or-minus 3° from [[https://en.wikipedia.org/wiki/Invariable_plane a particular plane]] (the "ecliptic plane"),[[note]]With Pluto demoted, Mercury is now the only exception and even its inclination is only 6.3°, although large bodies beyond Pluto and Batygin and Brown's theoretically-possible "Planet Nine" have orbits at very high inclinations (up to 30°) to the ecliptic plane.[[/note]] and that the majority of the star systems within UsefulNotes/TheMilkyWayGalaxy spiral arms are within 1° of the plane of the galactic disc,[[note]]applies to the arms only, not the bulge or the halo,[[/note]] though said invariable ecliptic plane is not coplanar with the galactic disk.
49
50!Related tropes:
51* TwoDSpace
52* TheInternetIsAnOcean
53* TheSkyIsAnOcean
54* SpaceIsAir
55* SpaceSailing
56* SandIsWater
57* WaterIsAir
58
59----
60!!Examples:
61
62[[foldercontrol]]
63
64[[folder:Anime and Manga]]
65* ''Anime/InfiniteRyvius'': The series takes place after the Solar System is given a NegativeSpaceWedgie. The result is the "Sea of Geduld" ([[GratuitousGerman from the German word for "patience"]]), a nebula-like cloud engulfing the bottom half of the ecliptic plane. Ships that go too far -- "deep", you might say -- inside are crushed by the radiation and gravity anomalies, unless they're built to withstand the "dive". In other words, submarines in space.
66* Creator/LeijiMatsumoto provided some of the most literal examples of this trope known to anime, as well as some of the oddest subversions.
67** ''Space Pirate Manga/CaptainHarlock'' is steeped in nauticality: the main title song references the "Sea of Space", the eponymous space pirate's ship ''Arcadia'' has a sterncastle, with a Skull and Cross Bones pirate flag hung above it (and [[LampshadeHanging there's actually a device made specifically to move the flag as if there was wind]]). The ship is steered with an old-fashioned wooden steering wheel, and Harlock has, on occasion, sailed her on and below an ocean. Harlock's friend Emeraldas' ship ''Manga/QueenEmeraldas'' is a literal ship, suspended from a zeppelin.
68** In ''Anime/SpaceBattleshipYamato'', Earth deliberately refits old (as in WWII-vintage) battleships as starships, and even continues to paint anti-fouling paint on them below the "waterline." The paint, however, makes sense, as the ship is intended to still function on water. Almost all the space combat is two-dimensional as well until a battle in Season Three where the Yamato attacks from below the plane of battle, spinning on its fore-to-aft axis to shoot enemies on all sides.
69** ''Anime/SpaceBattleshipYamato2199'' takes this almost literally but justifies the design of the ship as a method of camouflage during construction. However it regularly averts TwoDSpace with Yamoto being attacked from below or surprised from above...then again it also has sub-space submarines.
70** In ''Manga/GalaxyExpress999'', and ''Anime/TheGalaxyRailways'', though, [[CoolTrain space is a railway]].
71* ''Franchise/{{Gundam}}'':
72** ''Anime/MobileSuitGundam'' mostly avoids this territory (or [[MinovskyPhysics goes to great lengths]] to justify it), White Base still has a big, old-fashioned and suspiciously nautical steering wheel on the bridge. The same goes for both the Musai-class cruisers and Gaw-class carriers.
73** Deserving special mention is ''Manga/MobileSuitCrossboneGundam'', which has no less than two different ships designed to look like galleons, the ''[[http://www.mahq.net/mecha/gundam/crossbone/mothervanguard.htm Mother Vanguard]]'' and its sister ship, ''[[http://www.mahq.net/mecha/gundam/crossbone/eosnyx.htm Eos Nyx.]]'' There's a seeming justification in a later manga, where one character says "Well, if we're going to be SpacePirates, we might as well run with the theme!" But the fact is that ''Mother Vanguard'' was designed by an entirely separate faction, one that tended to be aristocratic and knightly rather than piratical.
74** Avoided completely with ''Anime/MobileSuitGundamWing'', for all of the talk about indestructible Gundams, there was little to no space warships (except for fragile Mobile Suit Carriers which did not pack much in the way of armaments) and Mobile Suits attacked from Space Stations and Asteroids.
75* ''Anime/NightOnTheGalacticRailroad'': The travel mode is a train.
76* The opening in ''Manga/OutlawStar'' gives a narration in most episodes heavily relating space to being an ocean. Also in one episode their ship rides a stream of aether through space.
77* ''Anime/SolBianca'' takes this one step further, in that the eponymous ship enters and exits hyperspace like a submarine diving or surfacing, ''complete with waves''.
78* In ''Literature/StarshipOperators'', the ships are on the same scale as battleships and (usually) fight like battleships. Two "stealth ships" are called "space submarines". Whenever any ship is destroyed, it's reported as having been "sunk".
79* ''VideoGame/SuperRobotWarsOriginalGeneration'' used Army ranks, while using terms that seem to be a combination of nautical and atmospheric flight along with some new ones. This could easily be explained by the fact that star travel is still really quite new -- they have some orbital colonies, a base on the moon, and a space station in the asteroid belt.
80* ''Anime/TengenToppaGurrenLagann'':
81** The CoolStarship suddenly sinks into a ''literal'' space ocean.
82--->"The Chouginga Dai-Gurren is going to sink!"\
83"Sink? This is space! Why would there be an ocean in space?!"\
84"It seems that the waves of ultra-dense space are pushing us down!"\
85"Yeah. Like I said. WHY THE HELL ARE WE SINKING IN SPACE?!"
86** In this case, it was supposedly space so condensed that it acted like water. This included things like pressure. In fact, when that pressure resulted in the super-condensed space punching holes in the hull and "flooding" the ship, they decided that it was more accurate to call it "spacing" than flooding.
87[[/folder]]
88
89[[folder:Comic Books]]
90* ''ComicBook/FantasticFour'': Taken very literally in an early issue. There's only time to send one of the Inhumans to rescue Reed, who's stuck in the Negative Zone; Black Bolt chooses Triton, the merman, because space is like an ocean.
91* The French graphic novel series, ''HK'' has the submarine route, as spacecraft here look like giant robotic whales and sharks. Whilst you don't see them battle each other, their decks are arranged in parallel like a submarine, and they land in bodies of water at harbors.
92* ''ComicBook/{{Superman}}'' story ''ComicBook/TheLivingLegendsOfSuperman'': In the 21st century, astronauts are naval pilots serving in the navy and are called sailors. And their ships are explictly compared with ships floating "on the oceans of Earth".
93* One French comic took the RecycledInSpace route with ''Literature/MobyDick'': the whalers become AsteroidMiners, the harpoons become ten-megaton nuclear warheads, the giant squid is a white dwarf, and Moby Dick is a sentient comet.
94* ''Franchise/WonderWoman'':
95** ''ComicBook/WonderWoman1942'': The concept that space is ocean-like informs the design of Uvo's fleet of spacecraft which manage to look both fish-like and like modified submarines.
96** Given a nod in ''ComicBook/WonderWoman1987'' where all of the Sangtee Empire space ships, from fighters to freighters, look like mechanical fish. The only exception are their giant space faring cities which instead look like cities in giant bubbles.
97* ''ComicBook/XMen'': The Starjammers fit this trope.
98[[/folder]]
99
100[[folder:Fan Works]]
101* ''Fanfic/TwilightSparklesAwesomeAdventure'': There are even space sharks.
102[[/folder]]
103
104[[folder:Film — Animation]]
105* ''WesternAnimation/TreasurePlanet'' has spaceships that have [[SpaceSailing big honking sails on them]]. The characters are not exposed to outer space in those ships, but are rather in a kind of backwards universe where normal physics do not apply uniformly. There's even a black hole that's treated as a whirlpool.
106* ''WesternAnimation/WallE'':
107** The ''Axiom'''s autopilot, who is literally the ship's steering wheel, turns so that the ship tilts and everybody slides across the floor.
108** The captain has a typical cruise liner captain's hat and jacket, previous captains as seen on the picture wall and in the [=BnL=] ads have the full uniform. The ''Axiom'' itself resembles a giant stylized ocean cruise liner.
109** In ''[[WesternAnimation/PixarShorts BURN-E]]'' it is revealed that the ship has actually tilted several degrees to one side. Not that it makes much sense, but it was pretty cool.
110[[/folder]]
111
112[[folder:Film — Live-Action]]
113!!!'''In General:'''
114* Inverted in the peculiar slew of movies that came out in 1989 that are basically SpaceIsolationHorror films, except set [[EldritchOceanAbyss deep underwater]], instead of in space.
115** ''Film/TheAbyss'' is probably the best-known of the bunch. It was a first contact HumanityOnTrial type movie, except instead of space aliens it was [[OurMermaidsAreDifferent a kind of sci-fi take on merpeople]].
116** ''Film/Leviathan1989'' was more or less ''Film/{{Alien}}'' but in an underwater mining station instead of a spaceship.
117** ''Film/DeepStarSix'', meanwhile, was also basically ''Alien'' but in an underwater military outpost.
118** ''Film/LordsOfTheDeep'' did a similiar first contact story as ''The Abyss'' but it was a lot dumber.
119** ''Film/TheRift'' (which came out in 1990, a year late) has alien-like monsters lurking in an air-filled cave deep beneath the ocean floor.
120!!!'''By Work:'''
121* It is noticeable, at the beginning of the film ''Film/{{Alien}}'', that as the Nostromo leaves planetary orbit, it does so to a swelling soundtrack reminiscent of a classical nautical adventure movie -- the music evokes a tall stately sail-ship leaving port rather than a beat-up cargo ship setting off into space.
122* Walt Disney's movie ''Film/TheBlackHole'' is a version of Creator/JulesVerne's classic novel ''20,000 Leagues Under the Sea'' set [[RecycledINSPACE in space]]. The ''Palomino'' was portrayed as a vertically-arrayed vehicle, and given the FX of the time the first half an hour of the movie makes a game attempt to portray a crew operating in free fall in a spacecraft that actually looks somewhat plausible, given FTL. It's an odd contrast to the rest of the movie.
123* Though the film ''Film/TheFifthElement'' has very few (and even less relevant) space aspects, it takes this trope to its logical conclusion: the luxury space cruise liner ''Fhloston Paradise'' is [[SpaceSailing shaped like a steam paddle boat]], and has a classical ''nautical steering wheel'' to make ''course corrections''. The "borders" of the Solar System also have floating buoys in [[TwoDSpace a single plane]].
124* In ''Film/TheManFromPlanetX'' an astronomer says, "The only difference between water and space is a matter of density."
125* In ''Film/ManOfSteel'', Zod's viral message refers to him crossing "an ocean of stars."
126* ''Franchise/StarWars''. Though many of the films' space battles would be incomprehensible if they took full advantage of 3D space.
127** Where the concept is taken to its ''reductio ad absurdum'' endpoint in ''Film/AttackOfTheClones'' where Obi-Wan Kenobi is forced to dodge seismic charges (read: depth charges) that make a loud [[PlanarShockwave "sonic" boom]] in a ''vacuum'' and send out a horizontally expanding shockwave.
128** The space battle that opens ''Star Wars Episode III: Film/RevengeOfTheSith'' takes this to an extreme, with kilometres-long spaceships side by side, firing broadsides at each other like ships of the line from the Age of Sail. Any doubt as to what the scene was trying to evoke was removed when you saw the ''gun crews'' loading and firing their giant blaster cannon through force-field gun ports. There's no excuse for the gun crews and gun ports, but the side-by-side combat is excusable: the battle takes place in the orbit of the Republic's capital planet. The attackers are not there for conquest but a raid and kidnapping; for that they have to get close to the planet to land ground troops safely.
129** In ''Film/ReturnOfTheJedi'' when Rebel vessels and Imperial Star Destroyers trade blasterfire during the final climactic space battle, with fighters streaming past in the foreground. This is justified however, in that the Rebel fleet is being fired on -- with devastating results -- by the Death Star. Their best chances at survival is to close in to short range with the Imperial Fleet. That way, the Death Star can't shoot at them without hitting the Imperial Fleet. As Lando says to Admiral Ackbar "Maybe we can take a few of them with us!"
130** Star Destroyers seem to array most of their guns in a top-turret and broadside position, making them comically vulnerable to anyone coming in from behind or below them.
131** This is abused in ''[[WesternAnimation/StarWarsTheCloneWars The Clone Wars]]'' when Ahsoka orders her ship to face the bottom at the enemy, thus rendering all damage to non-vital areas of the ship. (The concept being taken from ''Literature/TheThrawnTrilogy''.)
132** The idea of giant space-dwelling "sea" monsters is also used throughout the franchise, resulting in creatures such as the nebula-dwelling neebray mantas in ''The Clone Wars'', the purrgil (octopus-tentacled {{Space Whale}}s in ''Westernanimation/StarWarsRebels'') and the titanic, jellyfish-like summa-verminoth in ''Film/{{Solo}}''. ''Solo'' further features the Akkadese Maelstrom -- the summa-verminoth's home -- a perpetual space storm filled with roving carbon-bergs and a gravity well analogous to a giant whirlpool, making it effectively a space version of Scylla and Charybdis from ''Literature/TheOdyssey''.
133* ''Film/ThisIslandEarth''. Even the ''title'' is an example. Actually, during the space travel scene, the alien UFO does a very non-nautical manuever to dodge an asteroid, tilting right 90 degrees while gravity inside the ship remained the same.
134* The film version of ''Film/WingCommander'', ridiculously bad as it was, did do an interesting variation on this trope. In it, space was like an ocean, but spaceships were more akin to ''submarines'' than sailing ships (to the point that the crew was told to make no noise to avoid detection). Missiles had to be loaded into great honking tubes after the auto-loaders were said to have broken down from battle damage, they had depth-charge-like weapons.
135** Additionally, the missiles had to be fired manually by the loading crews on command from TheBridge instead of a single button on said bridge. Interestingly, the final space battle between the ''[[CoolShip Tiger's Claw]]'' and a [[CatFolk Kilrathi]] battleship ends up looking more like a surface naval battle with [[spoiler:the ''Tiger's Claw'' forcing the Kilrathi ship to come by her side and then opening up with a broadside]].
136** The {{Space Fighter}}s, though, looked more like UsefulNotes/WorldWarII fighters with a computer and a HUD and wouldn't look out of space with propellers on the front. They also, for some reason, include jump drives, even though they're never expected to perform jumps. Oh, and their on-board computers appear to have tons of data, including the identities of top-secret high-ranking operatives. The Kilrathi should've been trying to capture one of ''those'' computers instead of a Navcom AI.
137[[/folder]]
138
139[[folder:Literature]]
140* Used in ''Literature/{{Accelerando}}'' by Creator/CharlesStross to justify shooting [[NinjaPirateZombieRobot digital communist lobsters]] into space. They want to return to the ocean, but as digital entities that's not possible. Putting them in a space ship's computer and launching it into space, however...
141* ''Literature/{{Airborn}}'': In the final book, ''Starclimber'', space and its native life are portrayed as analogues to an immense ocean and marine life. This includes "space plankton", "barnacles" which grow on the cable of the space elevator the characters are using, and immense, bioluminescent, eel-like {{Space Whale}}s. The characters' speculations about the nature of the cosmos cast planetary system as shallow waters and deep space as the open ocean and its abysses, where creatures much larger than the ones they saw might lurk.
142* ''Literature/AlexisCarew'' leans ''really'' hard on the WoodenShipsAndIronMen [-InSpace-] styling. [[SubspaceOrHyperspace Darkspace]] is treated as the open sea, complete with shoals and storms. SpaceSailing is done by harnessing its currents, and ships navigate by dead reckoning and fight in broadside duels using hand-loaded single-shot laser cannons aimed by eye (because darkspace dampens electricity and otherwise resists any attempts to study it). The landlubber protagonist is also often befuddled in the first book by the constant use of archaic naval terminology:
143-->'''Alexis:''' ''(reading the name of a structural segment off her tablet)'' "Forward-twelve-port, first ''[[InherentlyFunnyWords futtock]]''"? Now you're just making things up!
144* The novel ''Berserker Fury'' '''is''' the UsefulNotes/WorldWarII naval Battle of Midway RecycledINSPACE! The AI robot ships are the Japanese and humanity is the Americans. Complete down to the planet named 50/50 (Midway), the "space carriers" ''Venture'' (USS Enterprise), ''Stinger'' (USS Hornet), and so on. They even broke the Berserker code, like the USA broke the Japanese Purple Code.
145* Creator/GeneWolfe's ''Literature/BookOfTheNewSun'' relies heavily on this. Space crafts are described as ships, the crew are called "sailors" and so on, to the point where it's often not clear whether the narrator is talking about seafaring or space travel. In the [[{{Sequel}} coda]] ''Urth of the New Sun'', the interstellar space ship turns out to have masts and sails, and to apparently be made partly of wood.
146** In ''Literature/TheBookOfTheNewSun'', the ships of the Hierodules travel through time and between Universes on mirrored sails. The terminology used is nautical to the extent that Creator/GeneWolfe [[DirectLineToTheAuthor expresses frustration]] that Severian draws no distinction between nautical and space vessels. Indeed, sailors themselves apparently find the two sorts of vessel interchangeable for employment.
147--> If a distant continent is as remote as the moon, then the moon is no more remote than a distant continent.
148* Creator/DavidDrake:
149** The ''Literature/{{RCN}}'' series is loosely based off the 18th century British navy, complete with spaceships that travel through hyperspace using sails. However, the sails are handled fairly realistically: stripping a ship's sails with a plasma cannon is a quick and easy way to keep it from escaping into hyperspace, the sails need to be furled and stowed before entering an atmosphere, and when deployed, interfere with the ships's realspace maneuvering and combat. In the same way that ''Honor Harrington'' is [[Literature/HoratioHornblower Hornblower]]/Nelson IN SPACE, the ''RCN'' books are ''Literature/AubreyMaturin'' IN SPACE, with Daniel O'Leary in the role of Jack Aubrey and Adele Mundy as Stephen Maturin (only with her being the ship's comms officer rather than its surgeon).
150** Drake's ''Reaches'' novels (''Igniting the Reaches'', ''Through the Breach'', and ''Fireships'') are Hakluyt's ''Voyages'' crossed with the adventures of Sir Francis Drake during the wars with Spain. It's 16th century exploration & piracy IN SPACE.
151** ''Literature/TheCitizenSeries'': Habitable planets are regarded as islands in the "sea" that is the Continuum, a sea which has currents that can speed or slow travel. The Bight between the Cutter Stream Colonies and their parent Home World, Brasilia, stands in for the Atlantic Ocean in particular, with mentions of a circular Continuum current that corresponds to the Easterlies and Westerlies. Unusually, though, the series also includes "trackways" that can be built across the Continuum to artificially stabilize currents (space roads), and Continuum combat behaves like UsefulNotes/WorldWarI and UsefulNotes/WorldWarII dogfighting.
152* Creator/HPLovecraft's ''Literature/TheDreamQuestOfUnknownKadath'' provides and early and very literal example of the trope. In the Dreamlands it is possible to reach the outer space simply by sailing over [[FlatWorld the edge of the world]] in a craft capable of surviving the rushing waters, and going on straight. The protagonist is kidnapped by a sinister crew of semi-human slave traders and taken captive to the Moon in this manner.
153* A note: despite 'Navigators', and a feudal setting, ''Franchise/{{Dune}}'' space travel is not in the least an example of this trope -- the Holtzmann effect, while never properly described, seems to work more like teleportation than anything else (huge distances are moved 'in the blink of an eye', actual 'sailing' is negligible on any scale, and space warfare non-existent apart from orbital skirmishes due to the Guild (who are neutral) monopoly on interstellar travel.
154** There are elements of this in the ''Literature/LegendsOfDune'' prequel novels with [[CanonDiscontinuity disputed canonicity]], which features plenty of space battles between the League Armada (later Army of Humanity) and the [[AIIsACrapshoot Thinking Machines]]. Unusual for this setting, though, the military ranks in use are all made up and, in fact, change throughout the trilogy. For example, the equivalent of a general would be a Primero (League Armada), a Bashar (Army of Humanity), and a Caid (post-Jihad). These fictional army ranks are also used by ship officers. Strangely, the novels have generals command both ground and space battles. One would think these would be two completely different types of combat, requiring different skillsets (you wouldn't put a naval admiral in charge of a ground battle or an army general in command of a fleet, would you?).
155* In ''Literature/EndersShadow'', Bean arrives at Battle School and goes exploring. He remarks: "Most poles and ladderways would merely let you pass between floors -- no, they called them decks; this was the International Fleet and so everything pretended to be a ship." Later on in ''Shadow Puppets'' Ender's father, after hearing a reference to a "dry dock", asks if there is also a "wet dock". Dimak's response is: "Nautical terminology dies hard."
156* ''Literature/TheExpanse'' embraces the trope of stellar navies with both the United Nations Navy and the Martian Congressional Republic Navy, each with their UN Marines and MCRN Marines respectively. The decks of the ships are perpendicular to the direction of travel, with thrust from acceleration and deceleration providing the g-forces used to keep people on the deck (and magnetic boots when not under acceleration).
157* Wet-navy terminology is heavily used in ''Literature/TheFlightEngineer'', as might be expected from a trilogy coauthored by Creator/JamesDoohan. Space itself is not an ocean, however, and at one point the series delivers a hilarious TakeThat to the ''Series/{{Star Trek|TheOriginalSeries}}'' episode where Roddenberry confused the ''Enterprise'' with a submarine.
158* Played straight in ''Literature/FutureHistory'', complete with [[SpaceClouds Space Clouds]], [[SpaceFriction Space Friction]], and a [[StandardSciFiFleet Standard SciFi Fleet]].
159* ''Creator/HarryHarrison'':
160** Harrison makes an effort to avert this (to an extent) in ''Literature/{{Starworld}}'', although the novel only has one space battle. An engineer shows the protagonist (also an engineer) a clip of a space battle from an old sci-fi movie and asks him to point out everything in it that's wrong. The protagonist can't do it, as he knows absolutely nothing about space combat and space travel in general. Among others, the engineer points out that the ship in the movie maneuvered like an airplane (banking hard), was able to stop on a dime to hide behind a planetoid, was using energy weapons (while lasers and plasma weapons exist in this 'verse, they're only useful at relatively short ranges), and had windows. Actual space combat is explained as between ships many kilometers away from each other, and the only weapons being used are missiles (both conventional and nuclear), although they are often deployed as screens (an impromptu mine field) ahead of the fleet. The reason the engineer needs the protagonist's help is to help him iron out the last few kinks on the [[LaResistance rebels]]' secret weapon -- a [[MagneticWeapons mass driver]] using plain old metal balls as ammo. They also have short-range autocannons firing rocket-propelled bullets. The entire CurbStompBattle is ridiculously short. The Earth fleet gets crippled by the mass drivers' opening volley with the autocannons delivering the coup de grâce.
161** Harrison made a habit of this. In ''Space Viking'', the structure of a spaceship is discussed in some detail, with the command center deep inside. During the space battles, the crew are well aware that attack can come from ''any'' angle, and keep eyes-high accordingly. Captain and other crew ranks are used.
162* While the design of his spacecraft reflect a working knowledge of engineering, almost every book Creator/RobertAHeinlein wrote that took place aboard a spaceship assumed nautical, particularly Naval, discipline and traditions, from Laz & Lor's stick-on Captain's insignia to Captain Hilda of the Gay Deceiver. This might have had as much to do with Heinlein's own Naval career as anything, although it has undoubtedly shaped the trope to some degree.
163** This is especially noticeable in his "Juvenile" novels that involved commercial or military space travel such as: ''Literature/BetweenPlanets'', ''Literature/CitizenOfTheGalaxy'', ''Literature/FarmerInTheSky'', ''Literature/SpaceCadetHeinlein'' and ''Literature/StarmanJones''.
164* The ''Literature/HonorHarrington'' novel series technology was set up explicitly so author Creator/DavidWeber could do ''Literature/HoratioHornblower'' [[RecycledWithAGimmick IN SPACE]], with formations of spacecraft blasting away broadsides at each other and even using "gravitational sails" to navigate hyperspace (hyperspace itself having "currents", "waves" and areas just too damn stormy...err, gravitationally random, to move through safely).
165** The overall plot was nice for most who knew their naval history, saying oh X is Y and so forth. Then [[OffTheRails Napoleon got nuked]] ...
166** ''Echoes of Honor'' is basically a retelling of CS Forester's ''Flying Colours'' -- only much, much bigger. Instead of escaping with twenty prisoners in a dinky cutter like Hornblower, having destroyed three small rowboats sent to chase him, Honor escapes with ''half a million'' prisoners and an ''entire battlefleet,'' fighting major battles on the way.
167** An article describing various literary examples of "Hornblower in Space" (including Weber's) can be found [[http://www.ansible.co.uk/sfx/sfx104.html here]].
168* Creator/AlanDeanFoster's ''Literature/HumanxCommonwealth'' series makes liberal use of naval metaphors in its space travel, including fleets of private merchant vessels that deliver goods from planet to planet on a monthly schedule, and "passenger liners" that do the same for people. It retains some of the metaphors of naval combat, although not all: starship combat is generally done at great distances with lightspeed or FTL weapons, but the notion of a StandardSciFiFleet along with {{Space Fighter}}s remains intact. The series does not, however, make the mistake of having spaceships look like oceanfaring vessels; quite the opposite: a KK-drive starship resembles a toilet plunger or a wineglass stuck onto an oblong main hull; the end of the "plunger" is the fan for an ArtificialGravity generator.
169* Played straight in ''Literature/IntoTheLookingGlass'' novel ''Vorpal Blade'' by Creator/JohnRingo. Humanity's only spaceship is a converted nuclear submarine. He also speculates that there are "standing gravity waves" in interstellar space; the space equivalent of oceanic currents.
170* In ''Literature/LandoCalrissianAndTheStarcaveOfThonBoka'', there is a species of giant rays that live in vacuum and consider it an ocean. The opening passage of the novel describes space as though it were an ocean.
171* This is one of the defining characteristics of the {{Literature/Larklight}} book series. Not only do (most) spacecraft strongly resemble sailing ships, space is also populated with a wide variety of ''fish'' that even grow increasingly stranger the further away they are from the sun, much like deep-sea fish on Earth.
172* In ''Literature/TheLostFleet'' series, there is a SpaceNavy with a StandardSciFiFleet using 20th-century ship types (e.g. destroyers, cruisers, battleships). Enlisted men and women are often called sailors. And even terms like "port" and "starboard" still survive. However, during the Battle of Kaliban, a civilian character asks Geary about the use of these terms as well as "up" and "down" in space, especially since the main body of the fleet is, at that point, inverted from the perspective of the rest of the ships. Geary explains that "up" and "down" are conventional directions with respect to the ecliptic (as long as it's determined ahead of time which hemisphere is "up" and which one is "down") of the current star system. "Starboard" is towards the star (Geary even mentions that attempts to replace it with "starward" failed), while "port" is away from the star. When asked what happens when ships are far from any star system, Geary replies that this never happens. Since the only known methods of FTLTravel involve either the use of HyperspaceLanes or a PortalNetwork, ships don't normally go out into interstellar space.
173** One thing that no one asks is what happens when multiple ships are already facing directly towards or away from the star, but on vastly different vectors.
174* ''Literature/MobyDick'': Ahab says the line "...where in her murderous hold this frigate earth is ballasted with the bones of millions of the drowned..." comparing the planet itself to a ship sailing through the cosmos.
175* Creator/PeterFHamilton's spaceships (especially in ''Literature/TheNightsDawnTrilogy'') are spherical, and for a reason: Adamist (that is, non-biotechnological) starships use a "ZTT drive" to jump across lightyears. The drive creates a wormhole that, like a black hole, has a spherical event horizon. Activating the drive while the ship is in non-spherical mode (that is, with sensors extended) will lead to everything beyond the event horizon being torn apart and compressed to fusion density. BOOM!
176** Edenist voidhawks, however, are far superior to Adamist ships in every way -- including FTL travel -- due to the fact that they are made of "bitek" (a biological material). Voidhawks are lenticular in shape rather than spherical. Blackhawks -- bitek starships with Adamist commanders -- on the other hand can be pretty much any shape.
177** Hamilton uses many SpaceIsAnOcean tropes, but in a manner that is far more ''2001'' than ''Star Wars''.
178* In ''Literature/NightTrainToRigel'' by Creator/TimothyZahn, space is actually a railway system. Go figure.
179* ''Literature/TheSilmarillion'' plays this trope straight with Eärendil, an actual sailor who ends up sailing the celestial oceans in an actual ship -- seen and interpreted as a star.
180* In Creator/MichaelFlynn's ''Literature/SpiralArm'' series, this is played with: the ''terms'' have clearly been lifted from ocean ships, but they mean very different things.
181* ''Literature/StarCarrier'':
182** Much like ''Series/BattlestarGalactica2003'', below, the series relies on 20th- and 21st-century nautical metaphors rather than ones from the Age of Sail. For example, it's not a bridge or quarterdeck, it's a CIC, and the commander of the fighter wing has the title "Commander, Air Group" (which gets lampshaded, and explained as the old name sticking despite efforts to update it), CAG for short. (Note here that the author served in Vietnam as a Navy corpsman.) The ''America's'' CIC is also placed in a better-protected location, in the [[CentrifugalGravity habitat rings]] aft of the giant mushroom-shaped shield cap at the bow. Even the Navy [=SEALs=] are still around, except the acronym was updated to SEALS (the second 's' being "space").
183** Later books introduce an alien race called the Slan, whose primary sense is auditory and who use echolocation to "see". This has drastically affected their development as a culture. Since they primary live in caves, they treat the surface as a gigantic cave. They're unable to "see" stars, since their light-sensing organ is far too weak for that. They didn't even reach space until given the technology by another race. Even then, they have a hard time comprehending the idea of space, interpreting it as a vast airless cave that requires special vessels to move across.
184* The ''Starwolf'' series by David Gerrold was written as a SubStory InSpace, because the vast distances involved means all the action is confined to SensorSuspense or the [[CabinFever tensions created among the crew who are confined inside the ship]].
185* Creator/ArthurCClarke's short story [[http://www.planetary.org/solarsailcd/clarke.htm The Wind from the Sun]]. This is an interesting case because it manages to evoke the feel of ocean travel in space despite being a fairly realistic and hard work. It is a story about literal SpaceSailing -- using perfectly realistic {{Solar Sail}}s, shown to behave the way one would expect given RealLife physics.
186* Generally averted in Creator/HarryTurtledove's ''Literature/WorldWar'' books and their sequels. When humans start building spacecraft of their own, the ranks they use are Army ranks, and ship commanders are called Commandants. Even the use of the word "ship" for a spacecraft is lampshades by a Chinese peasant woman, who hears a male of the Race refer to the craft in this manner, wonder why he says that about a "plane-that-never-comes-down", since it flies instead of swimming. It's also strange that a race that has never had a wet navy in their history (due to being from a desert world) would call a spacecraft a "ship".
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189[[folder:Live-Action TV]]
190* Downplayed in ''Series/{{Andromeda}}''. While it certainly includes some of the typical trappings of a SpaceNavy, such as spacecraft being called "ships" and their commanding officers being called "captains" (reporting to admirals), the ships themselves use ArtificialGravity to fly around and maneuver like fighter jets.
191* ''Series/BabylonFive'' did dispense with the atmospheric flight analogies, but retained many of the naval ones. It is even mentioned on-screen in the movie "A Call To Arms" that the command decks of Earth ships are traditionally modeled on a submarine. Probably because submarine warfare is the closest analogue to space combat you are likely to find until it actually exists: the arena is 3D, visual targeting is almost always useless, and a small hole in the ship is a major problem rather than a minor inconvenience. Another strange thing is the classification of ships. It seems that the newer, more powerful ships in [[SpaceNavy EarthForce]] are called destroyers (''Omega'', ''Warlock'', ''Victory''), while the older wartime ships are called heavy cruisers (''Hyperion'') and dreadnoughts (''Nova''). This is despite the fact that destroyers are frequently larger than heavy cruisers or dreadnoughts. For example, the ''Omega'' is, basically, the old ''Nova'' with the addition of a spinning central section and less powerful but longer-ranged weapons.
192* The modern ''Series/{{Battlestar Galactica|2003}}'' avoided many of the [[WoodenShipsAndIronMen traditional]] SpaceNavy trappings, to replace them with the trappings of a modern US Navy aircraft carrier. A case of ShownTheirWork, there are many details lifted straight from modern naval procedure and culture. Your typical viewer likely has no idea why engineering types are called "snipes" for example.
193** Perhaps most notable the CIC (rather than the 'Bridge') is deep inside the ship, with no windows to the outside. Others include use of the terms CAG and CAP.
194** Lampshaded in ''Face of the Enemy''. When stranded in a Raptor with a non-operational FTL, one of the crewmen in Felix's group begins praying to Poseidon. One of the Eights on board is puzzled since they're a long way from water. He replies that they're in a ship so it's close enough.
195* ''Series/DoctorWho'':
196** [[Recap/DoctorWho2007CSVoyageOfTheDamned "Voyage of the Damned"]]: The space ''Titanic'' is built to look just like the original, and even has a ''life preserver'' (as in the flotation device) on the front.
197** [[Recap/DoctorWhoS31E2TheBeastBelow "The Beast Below"]]: The Doctor realizes there is something wrong because of the lack of engine vibration -- the assumption being that ''of course'' a spaceship would need engines constantly running to move through space. [[spoiler:They don't need the engines because the ship is being moved via a SpaceWhale swimming through space.]]
198*** Long-range spaceships are usually designed to accelerate for half of the distance (until the turnaround point) and then decelerate, so the engines are always in use. Now, Starship UK may not have had a set destination (and thus no turnaround point) but that's even less realistic: Picking a random vector and drifting is the worst possible way of approaching a star, let alone a habitable world.
199*** Even if not needed for propulsion there would still be the need for power, lights, artificial gravity, etc.
200** [[Recap/DoctorWhoS32E3TheCurseOfTheBlackSpot "The Curse of the Black Spot"]]: An Earth pirate is able to successfully fly the TARDIS because it is so analogous to his pirate ship. He can determine what parts of the control panel are the "compass" and "wheel" based entirely on his life experience as a pirate captain.
201* ''Series/TheExpanse'' embraces the trope of stellar navies with both the United Nations Navy and the Martian Congressional Republic Navy, each with their UN Marines and MCRN Marines respectively. The decks of the ships are perpendicular to the direction of travel, with thrust from acceleration and deceleration providing the g-forces used to keep people on the deck (and magnetic boots when not under acceleration).
202* ''Series/{{Firefly}}'' made frequent use of the nautical metaphor, even though it was somewhat at odds with the style of the show as a SpaceWestern. In particular, Mal ''will not stop'' calling the ship a "boat." "Wagon" wouldn't have had quite the same ring.
203** The Alliance cruisers in the series were designed to avoid this. The result is a ship consisting of four large vertical towers, with fighters and other craft launching upside-down off a flight deck at the "bottom" of the ship. It looked more like a mobile city than a ship. The smaller warships that appeared in ''Film/{{Serenity}}'' resembled nautical vessels more, but that's likely because they're meant to operate in atmospheres as well as space.
204** From interviews and DVD commentaries, the feel of ''Serenity'' specifically was supposed to be submarine-oriented rather than ship-oriented, which does then make the nickname of "boat" remind one more of "u-boat" (a German word for "submarine" even if in English it's used almost exclusively for German World War submarines) than surface ships and boats. This was deliberately designed to contrast with the Alliance "floating cities" as a way of showing the concept of efficiency (submarine-like ships that don't waste any part of the structure) and decadent waste (alliance ships being designed to be impressive, but not efficient). This is best highlighted in the episode "Bushwacked" when Kaylee displays a willingness to take on the Alliance single-handedly for daring to call ''Serenity'' a junker -- Alliance ships are the junk vessels to her because of their (dangerous) lack of engineering logic.
205*** One aversion is the cockpit, which is located right and the front rather than on top, and leans far more towards an aircraft's flight deck than a nautical bridge.
206*** Submarines are referred to as "boats" in the US Navy, too.
207* The [=GoGoVoyager=] of ''Series/GoGoSentaiBoukenger'' meets the same fate as the battleships in ''Space Battleship Yamato''. At first it is a (VERY large) battleship which, naturally, reconfigures into a giant robot, [=DaiVoyager=]. At the end of the series, [=GoGoVoyager=] has been converted into a spaceship... quite badly, if the cockpit is any indication.
208* ''Series/MysteryScienceTheater3000'' tended to vary in its depiction of space depending on [[RuleOfFunny which was funnier at the moment]]. In TheMovie, the Satellite Of Love's controls were shown to be identical to a boat's helm, and Gypsy, piloting the satellite, was wearing a sailor's cap and singing a sea shanty.
209* Inverted in ''Series/SeaQuestDSV'', whose premise was basically "The Ocean is Space".
210** The show pretty much ignores fluid dynamics whenever it's convenient and goes with the WaterIsAir idea.
211* In general, ''Series/SpaceAboveAndBeyond'' tended to have nautical metaphors for the larger craft and, like ''Series/{{Battlestar Galactica|2003}}'', atmospheric flight metaphors for the one-person craft. The analogy seemed to be with an aircraft carrier.
212** Specifically, the capital ships in the series -- ''Saratoga'', ''Hornet'', etc. -- are all named after US Navy aircraft carriers, though with ground troops and their transports also aboard, the capital ships seem closer to present day amphibious assault ships. Notably, however, the Space is an Ocean analogy is not extended to the small transport craft, which are referred to by the decidedly land-based term of [[AwesomePersonnelCarrier APC]], rather than as "landing craft" (as they are often used to ferry troops to planetside from space) or simply, "transport."
213* ''Series/StargateSG1'' and ''Series/StargateAtlantis'' avert this trope in some ways, but follow it in others:
214** Since the Stargate program is run by the U.S. Air Force, it uses more Air Force than nautical analogies. (And with official Air Force technical advisors, they generally [[ShownTheirWork get the details right]].) For example:
215*** One of the spacecraft in ''Series/StargateAtlantis'' was dubbed the "Puddle Jumper", an aircraft name (though it was called a Gate Ship by the original creators, as well as [=McKay,=] [[SugarWiki/FunnyMoments in two separate realities]]). Admittedly, there was [[MultipleReferencePun another very good reason]] for calling it that.
216*** The terms used to describe ships and their commanders follow Air Force conventions. For example, when hailing another vessel the commander might introduce themselves as "General Hammond of the Earth vessel ''Prometheus''." This contrasts with the common science-fiction convention of referring to the commander as a Captain or Admiral and calling the vessel "USS ''Name''", which would follow Navy conventions.
217*** Prototype USAF starships and fighters are dubbed "X-301" and similar, following Air Force practice for experimental aircraft.
218** On the other hand, the show also demonstrates how deeply entrenched this trope is, in that all major Earth starships are named like Navy ships, and in the fact that they're actually ''called'' "ships" as opposed to "aircraft" or "spacecraft."
219*** Since the characters of the Franchise/StargateVerse are quite GenreSavvy (in multiple instances comparing their spacecraft to those of ''Franchise/StarTrek''), one interpretation is that even for them, the idea of calling a spacecraft a "ship", the command center the "bridge", and the prison the "brig", are so deeply entrenched that it simply sticks. Or at the very least, the Air Force is aware that their 303s and 304s are more like aircraft carriers than anything else, and borrow some of the terminology.
220** In a possible reference to this trope, when Ba'al screws around with the timeline in ''Film/StargateContinuum'', the ''Navy'' runs the Stargate program in the alternate timeline instead of the Air Force. The original SG-1 are all slightly put off by this revelation. Which is a little strange, since this timeline's Earth does ''not'' have any starships.
221* In ''Series/UFO1970'', it appears that Space Is the English Channel given the number of [[UsefulNotes/WorldWarII Battle of Britain tropes]] it draws upon: Moonbase is the beleaguered sector airfield, SID (Space Intruder Detector) the RDF radar post, and calmly speaking young women (WAAF's) vector in SHADO Interceptors (Spitfires) against the anonymous alien invaders (German bombers). But given that the Moon takes 27.322 days to orbit the Earth, [[FridgeLogic one wonders why]] the aliens don't just attack SHADO headquarters when the Moon is on the opposite side of the planet.
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224[[folder:Music]]
225* Not only is space an ocean in ''[[Music/DougAnthonyAllStars DAAS Kapital]]'', but the spaceship of choice is a submarine!
226* '''39'' by Music/{{Queen}}, though it's more to draw an analogy between space exploration and the Age of Exploration. In fact it can be thought to be about actual sea exploration at the beginning. It starts out with terms like "the ship sailed into the blue". Space travel is hinted when "milky seas" are mentioned, then at the end we see that time dilation came into effect.
227* Bruce Dickinson's "Navigate the Seas of the Sun" is a song about space travel.
228[[/folder]]
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230[[folder:Mythology]]
231* The Ancient Egyptians actually did believe that space was an ocean, named Nuun.
232[[/folder]]
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234[[folder:''Star Trek'']]
235* ''Franchise/StarTrek'' made as much of the nautical metaphor as it possibly could.
236** A maritime tradition that survives in Starfleet is the tradition of [[MarriedAtSea ship's captains performing wedding ceremonies]]. Kirk, Picard, and Janeway all have this honor on the show, even saying the same words (presumably an official text for Starfleet captains): "Since the days of the first wooden vessels, all ship masters have had one happy privilege: that of uniting two people in the bonds of matrimony."
237** ''Series/StarTrekTheOriginalSeries''
238*** The fact that Dr. [=McCoy=]'s nickname is Bones is also a reference to the sailing era, being a common period nickname for the ship's surgeon, short for "sawbones."
239*** The episode "Balance of Terror" hyperextended the metaphor by presenting a [[CloakingDevice cloaked ship]] as analogous to a submarine. The crew of the Enterprise has to be quiet while the Romulans are hunting them in a situation analogous to sonar.
240*** In the episode "The Ultimate Computer," Kirk says, "All I ... ask is a tall ship and a star ... to steer her by." You ... you could feel the wind at your back in those days. The sounds of the sea ... beneath you, and even if you take away the wind and the water ... it's still the same. The ship is yours. You can feel her. And the stars are still there, Bones."
241*** The ship uses whistles before some broadcasts on the ship's internal comms exactly the same as Navy ships do. Originally, in pre-modern times, the whistle was used to call all hands to the deck to hear the day's General Orders. Today, it's more to catch everyone's attention before the broadcast. This tradition was mostly dropped from later incarnations of the franchise.
242** ''Film/StarTrekIITheWrathOfKhan'': The Enterprise beats Khan's ship by maneuvering in ''3'' dimensions. Spock [[LampshadeHanging specifically mentions]] this, saying Khan is used to "old wars" and thus doesn't think in three dimensions, only two.
243** ''Film/StarTrekVITheUndiscoveredCountry'': When the Enterprise interior is being picked apart from top to bottom the atmosphere as a whole subtly gives the impression of an actual naval vessel in space. The ship's bell even rings in a few scenes. The space battle comes off as two surface warships attempting to pin down a particularly stealthy submarine, presumably one that never needed to surface for air.
244** ''Series/StarTrekTheNextGeneration''
245*** In the episode "Allegiance," Picard sings "Heart of Oak," an old British navy song.
246*** "Yesterday's Enterprise" shows what life would be like on the ''Enterprise-D'' if she had been designed as a dedicated warship, and the effect is pretty familiar to anyone who has served in a modern navy: crowded, utilitarian, and noisy -- even aping the constant PA announcements in the background. If you listen closely, references to the ship's CIC can even be heard in a scene set in Ten-Forward, which is no longer a bar, but a place for the crew to gather and eat the Starfleet equivalent of B-rations.
247** In ''Film/StarTrekGenerations'', Worf's promotion ceremony is held in a holodeck recreation of a 19th century British Naval vessel, complete with period uniforms and a plank.
248** ''Film/StarTrekInsurrection'': Picard's personal diplomatic craft is called a "yacht."
249** According to longtime Star Trek graphic designer Michael Okuda, illegible signage in the various series often referred to emergency escape pods as "lifeboats."
250** ''Series/StarTrekDeepSpaceNine:''
251*** "Explorers" involves Captain Sisko [[RecycledINSPACE playing Thor Heyerdahl in a replica of an ancient Bajoran ship powered]] by {{Solar Sail}}s. Extra points to this one in that the spaceship has actual ''rigging'' -- rigging that has to be altered manually like a sailing ship. Apparently the Bajorans invented interstellar flight some time before things like hydraulics, computers or mechanization ... They ''were'' working from one particular inventor's plans, and needed an exact duplicate to prove a point.
252*** In "Playing God", Jadzia Dax straight up says that they "picked up some kind of subspace seaweed" while out in the runabout shuttle.
253*** "For the Uniform" plays a modernised version. Due to the ''Defiant's'' computer core having been mostly wiped by a computer virus the ship has to be flown with a larger crew than is normally visible, with orders relayed from the bridge all over the ship and characters giving detailed instructions and echoing commands. The resulting cacophony of overlapping voices rather accurately captures what the CIC of a modern warship sounds like.
254** The film ''Film/StarTrekBeyond'' kinda plays with this trope to the max during the climax when the USS Franklin flies straight into the drone swarm fleet. It visually looks like a rogue wave.
255** ExtendedUniverse:
256*** A ''Star Trek'' novel describes Starfleet regulations as being "copied from old US naval regs." While this book isn't canon, it does suggest that Starfleet was consciously modeled on an oceanic navy.
257*** The "NCC" prefix of Starfleet ship registration numbers stands for "naval construction contract."
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260[[folder:Tabletop Games]]
261* ''TabletopGame/{{Alternity}}'': not only warship classes are modelled after RealLife naval ones, them as the Battle Cruiser (heavily armed and sacrificing armor in exchange for speed) being more or less like their sea equivalents, but also artwork of most of them gives them a well-defined top and bottom, up to having a citadel on the former.
262* ''Attack Vector: Tactical'' tends towards the harder-than-diamonds end of sci-fi and therefore avoids directly copying mechanics from wet navy combat. However, the military organization structures are all over the place. Novaya Rossiya calls the space branch of its military the Artilleriya Kosmosa and refers to its starship crew members as "soldiers," their ''Shokoladki''-class starships are even officially classified as "Space-Mobile Artillery Platforms." Meanwhile, the Caliphate of Medina based the organization of the Medinan Star Force on the [[UsefulNotes/BritsWithBattleships Royal Air Force]], by way of the Pakistani and Egyptian Air Forces, so their starships are classed as "Multi-Role Fighter," "Attack Spacecraft," etc. Olympia, Xing Cheng and Novo Brasil play it perfectly straight with their naval-style space forces and fleets of [[StandardSciFiFleet cruisers, destroyers and frigates]], however.
263* ''Battle Space'', the space-combat game based in the ''Battletech'' universe, avoids most of these aspects. While played on a 2D board, ships act in 3D space, there is no friction so all movement must be countered by spinning the ship around and applying thrust, some larger ships (jumpships/warships) have ambiguous hulls to hide the bridge (though, it should be pointed out that every captain would have intel on all non-top secret ships, so this would be moot), and fighters, dropships, and a few landing craft are the only things that can enter the atmosphere without being destroyed. There are still many that are unavoidable (space travel times, ship class names), but most of that is handwaved as otherwise it would be horrendously boring.
264* The implied setting for Fourth Edition ''Dungeons and Dragons'' includes the Astral Sea. Despite the Astral Sea being three-dimensional and possibly infinite, a "surface" exists that most creatures stay near out of instinct.
265* ''TabletopGame/FullThrust'' is a truly great tabletop wargame, with great background fluff, realistic (semi-optional) "vector movement" rules, and a variable unit system -- the game system measurements come with a suggested (very reasonable) scale, but is in the end explicitly left up to the players to decide. In one game, 1 Movement Unit might be a single kilometre, while in another, it might be a whole AU or more. 1 point of Mass might be the suggested 100 tonnes and scale linearly, or it might be 10 and scale logarithmically.
266** Best of all, the turns do not alternate; the players write down their movement orders for the turn, fire ordnance based on anticipating the enemy's movement, move their ships, resolve ordnance fire and then take turns firing the main ship-to-ship weaponry -- all in the same turn! Makes the game a lot more realistic, and more about actual tactics than quirks in the rules.
267* ''TabletopGame/MageTheAscension'' has the Sons of Ether, techno-mages based around fringe, outdated, and/or pulp science, who have galleon-like Etherships whose sails catch "etheric currents." That Ethernauts tend to stand on the decks of such ships, dressed in nautical steampunk and firing lasers from cannons, is in line with the Etherite mentality. It also [[TakeThat irritates their foes]], as the [[TheRival Void Engineers]] are constrained by a 'no oxygen/waves in space' paradigm. [[note]]The straw that drove the Sons of Ether out of the Technocracy was the latter's decision to exclude Ether from the accepted Paradigm, which, among other things, took the Ocean out of Space.[[/note]]
268* Space often seems very nautical in ''TabletopGame/RocketAge''. There are pirates, fairly traditional navies and the great black beyond often seems more like an ocean to be crossed and explored.
269* ''TabletopGame/Space1889'': Justified. European countries have their regular ocean navies handle the liftwood ships and aether flyers and since liftwood is relatively new (less than twenty years ago) to the Europeans their shipbuilders mostly use nomenclature, technologies and techniques from the regular navy.
270* The ''TabletopGame/{{Spelljammer}}'' setting for ''TabletopGame/DungeonsAndDragons'' has rather a lot of starships that look like sailing ships. This is because at the tech level of ''Dungeons & Dragons'', major trading centers on planets are likely to be coastal or at least river cities. Many of the spelljammers are designed to be capable of landing on water, so they can use the existing facilities (docks, presence of longshoremen to act as temporary workers to load and unload cargo, large and thriving merchant community). It's also explicitly stated that since the only really essential piece of equipment is the jamming helm, for most cultures it's easiest to take a vessel you've already got lying around and slap a helm in it, and water-based cargo vessels tend to be significantly larger than land-based ones, ''so''...\
271Combat rules are based on 2D combat. There's no provision for soaring over or diving below another vessel. A valiant effort is made to justify this in the form of the "gravity plane": in ''Spelljammer'', objects in space have... for some reason... a gravity plane, and gravity acts in a direction normal to this plane (from both sides, so it's ''possible'' to design a ship with decks on both the "top" and "bottom", though such a ship can't ever land on either land or water for obvious reasons). What's not explained is how the gravity plane "knows" to pass through the ship parallel to the decks instead of, say, perpendicular to them. There's also not just friction in space, but no concept of inertia whatsoever: no matter how fast you were moving last turn, if you don't use your movement points this turn, you don't move.
272* ''TabletopGame/{{Starfire}}'' has fleets of starships, with size classes named things like "light cruiser", "battlecruiser", "superdreadnought", etc., who cruise under constant engine power and always follow their noses. The Terran Federation Navy is run by admirals, who give orders to starship captains. Messages sent between star systems have to be delivered by courier drone, or in person, since radio signals can't travel through a warp point. And, of course, the game is plated on a flat map, which in the first edition was even blue in color.
273* The Empire sourcebook for the old ''TabletopGame/StarWarsD6'' presents, in addition to classical SW ships as the Imperial Star Destroyer and others (an escort carrier, several types of cruiser, etc) based on wet navy ones, an "Star Galleon" -- basically an armed and armored transport, don't think on a sailing vessel. Said ships do not follow RealLife ship classes, with (star) destroyers dwarfing cruisers.
274* ''TabletopGame/TranshumanSpace'' for ''TabletopGame/{{GURPS}}'' both uses and averts this trope. Set at the turn of the 23nd Century (2199-2205), in sci-fi universe that doesn't leave the Solar System, the United Kingdom's space forces are formed by the Royal Navy, while the Chinese are based on the Army Rocket Forces, and the American space force is an extension of the Air Force, who beat the U.S. Navy in a bidding war. So the UK forces use naval metaphors, while the others don't.
275* There's an illustration for ''TabletopGame/{{Traveller}}'' if memory serves right that features a space carrier with a flattop and a bridge to one side as if it was the sea equivalent.
276* The ''TabletopGame/{{Warhammer 40000}}'' [[GaidenGame spinoff game]] ''TabletopGame/BattlefleetGothic'' is a great example of this. The game and the ships in it joyfully embrace the [[RuleOfCool coolest aspects]] of naval combat through history, with vast hypertech vessels using Napoleonic broadside-based tactics of lines and crossing the T, ancient Greek-style ramming and boarding actions, early 20th century torpedoes and torpedo boats... Eldar ships even have solar ''sails'', need to be at the right angle to the sun to work most effectively, and sometimes ''tack''.
277** ''TabletopGame/RogueTrader'' runs with this -- there's more detail on life in a spaceship, and it's surprisingly similar to living on an [[WoodenShipsAndIronMen Age of Sail vessel]] (only [[DarkerAndEdgier GRIMDARK]], of course). It's also got that lovely submariny touch of Silent Running for stealth purposes -- in fact, this is stated to be the main way to disengage from a battle. Ships have a Fore, Aft, Left and Right side -- no love for top and bottom...
278*** The Horus Heresy supplements by Forge World take this even further, introducing a bewildering array of ship types, in addition to the Standard WWII, with names taken from the Age of Sail, such as barques, arks, carracks, galleons and galleass. How a 16th century combined sail and oar propulsion ship translates to space is best left to the imagination, but apparently it is favored by Rogue Traders and approaches a Battleship in power, being able to clear the orbit of a planet and launch a counter-invasion on its own.
279[[/folder]]
280
281[[folder:Video Games]]
282* ''VideoGame/CastleOfShikigami III'' has this line from CanonForeigner [[VideoGame/TimeGal Reika Kirishima]]:
283--> '''Reika:''' [[ShapedLikeItself Space is an ocean of space.]]
284* ''VideoGame/ConquestFrontierWars'' has a Navy-life stucture with space battle ships and even a space aircraft carrier, other units do look more like airplanes. The SpaceIsAnOcean idea is further emphasized by the [[EnergyBeing Celareon]] ships looking like {{Space Whale}}s.
285* ''VideoGame/EccoTheDolphin'': At the end of the game, Ecco [[spoiler:swims from Earth to Vortex, a planet in the Pegasus constellation]].
286* ''VideoGame/EmpireEarth'':
287** The sequel treats space as a SettingUpdate of ocean maps: planets are big round "islands", with space docks and space turrets built on the edge (so no space and water on the same map). Space ships are divided into space fighters, space corvettes, space battleships and space carriers, who can all fire at space targets, but only battleships and fighters can fire at ground buildings, and only fighters can enter the planet to shoot ground and air units (the battleship's Devastating Beam Of Death can shoot ground units but takes a while to recharge).
288** The Prophet gets an update as well: his Hurricane (mobile anti-ship spell) is replaced with a MeteorStorm that turns a fixed area of space into death to space ships.
289** The Pharos Lighthouse (grants visibility over a huge area of water) is replaced with the Space Station, which instead makes spaceships harder to kill.
290* The ''VideoGame/EscapeVelocity'' series of shareware games use most of these aspects. Spaceships are ships, bridges are either at the front or on top, 2-d space, sound, only a few days to the next system, etc. However, with the exception of a few "inertialess" ships there is no friction in space (unless, oddly enough, a ship is disabled), which makes combat turn out like jousting.
291* Zig-zagged like crazy in ''VideoGame/EVEOnline''
292** Ship classes like Frigate, Cruiser, Battleship and so on all exist, and space has friction. WordOfGod says the programers cheated the space physics by using fluid dynamics formulas in the engine, and canonically, space in EVE has fluidic properties, which is why the game has missiles that use control surfaces to guide them as well.
293** On the other hand, a "torpedo" is simply a name for an immensely large, slow-moving missile, while the game also has rockets, missiles, and even cruise missiles. 3D space also plays a heavy role in travel and tactics, and space battles tend to have a more-or-less spherical front line rather than a two-dimensional one.
294* ''VideoGame/{{Freelancer}}'' fits this trope to a tee. There ''is'' SpaceFriction: you lose speed if you kill your engines, and your ship returns to normal speed once you stop hitting the afterburners. Spacecraft are called ships, and although civilian spacecraft are called ''fighters, transports,'' or even ''space trains,'' capital ships are known as cruisers, frigates and ''gunboats.'' You wander around a TwoDSpace, capital ships have a bridge with a big window more often than not, the SciFiWritersHaveNoSenseOfScale and somehow managed to create entire planets only a few times bigger than a tiny little outpost, and on top of that, planets and stations are like fixed islands, completely devoid of rotation and translation. However, the game is well done enough to actually make this weird form of outer space rather believable.
295* The ''VideoGame/FreeSpace'' space sim games refer to spaceships in nautical terms. The militaries that use these ships are called are called navies, and use navy ship classifications and personnel ranking. Fighters are akin to UsefulNotes/WorldWarII atmospheric fighters -- ''[[OldSchoolDogfight WorldWarII-style dogfights]]'' are actually mentioned ''on the box'' as a primary selling point. ''VideoGame/FreeSpace2'' even has a hidden pirate ship, the ''Volition Bravos'', as an EasterEgg (it can be summoned using a cheat code). ''VideoGame/FreeSpace'''s terminology is an interesting example. It turns out that "destroyers" are battleship/aircraft-carrier hybrids and the largest warships in the game, while "cruisers" are the smallest, cheapest warships. The second game, set 32 years after the first, introduces "corvettes" which are in-between destroyers and cruisers in size, and a single frigate, which was corvette-sized but explicitly atypical and therefore didn't indicate what frigates are ''supposed'' to be by then[[note]]the description puts that specific frigate as a one-of-a-kind pocket destroyer -- the firepower and armor rating of a destroyer, the size of a corvette, and greater speed than either[[/note]]. Fighter units are formed into "squads," with "wings" being tactical elements of up to four fighters. Since this occurs centuries in the future however, it's likely all these changes were intentional, especially since Volition hired an ex-Marine NCO as a military consultant.
296* The PC game ''VideoGame/GratuitousSpaceBattles'' uses 2D space, friction in space and space fighters, Damaged ships even catch fire. Some mods have gone full circle, using the game to portray [=WW2=] naval battles.
297* ''Franchise/{{Halo}}'' both uses and subverts this:
298** The UNSC ships are fairly boxy, but still has the bridge on the outer portion with a big window. The Covenant ships however, have their bridges close to the centre of their fairly streamlined designs. The series does, however, avert TwoDSpace; see that entry for details.
299** The books hint that the UNSC Navy was consciously modeled after oceanic naval traditions, with some characters even lampshading the foolishness of human bridge placement; ''[[Literature/HaloTheColeProtocol The Cole Protocol]]'' has a raiding Covenant Elite speculate upon seeing one that humans have far more reckless courage than most other races of the galaxy.
300* ''VideoGame/{{Inca}}'' features a Tumi-shaped Inca ship fighting Spanish galleons, in space.
301* The DS title ''VideoGame/InfiniteSpace'' refers to space as the "Sea of Stars" and ships generally follow the principles outlined in the intro. However, they do adopt wall formations instead of lines.
302* ''VideoGame/KaptainBraweABraweNewWorld'' is, essentially, ''VideoGame/MonkeyIsland'' RecycledINSPACE. According to the intro, humanity managed to make it into space in ''19th'' century. So you have ''wooden'' spaceships with ion engines. Basically, the game takes every early sci-fi trope and runs with it. Planets are treated as no more than islands in ''Monkey Island''. For example, an entire planet can consist of a bankrupt hotel and the immediately surrounding area. [[TheFederation Union]] SpacePolice precinct 13 is a wooden SpaceStation that looks like a giant barrel with a funnel. Naturally, there are SpacePirates, although they later go under new management and become an evil corporation instead.
303* ''VideoGame/KidIcarusUprising'' takes this trope literally, as space is an actual ocean called the Galactic Sea where all the constellations are held in place. It's home to, among other things, SpacePirates who sail in a literal spaceship, green {{Space Whale}}s and a monstrous astral {{kraken|AndLeviathan}}.
304* The various worlds in ''Franchise/KingdomHearts'' can be reached by travelling on the ocean, if Sora and Riku getting a MessageInABottle from another world at the end of ''VideoGame/KingdomHeartsII'' is any indication.[[VideoGame/KingdomHeartsI The first game]] features [[SpaceWhale Monstro flying through space]] along with Captain Hook's ship. It also features Sora, Riku, and Kairi planning on visiting other worlds by taking a raft out to sea, with ''VideoGame/KingdomHearts3DDreamDropDistance'' implying that, had their world not been destroyed, they might've succeeded.
305* The Bioware RPG ''Franchise/MassEffect'' has this in spades, with nearly all of the terminology used by the Normandy crew (skipper, aye aye, aweigh, ashore...), the fact that the force it serves is the Alliance Navy, and the fact that a few other species' ships are given naval names as well (ex: the Quarian Flotilla). There are no particularly questionable uses of this trope, however.
306** The final mission of ''VideoGame/MassEffect2'' shows the Normandy maneuvering through a debris field in a manner more suited to a stunt airplane than a ship. It seems that Franchise/MassEffect uses this trope for organizational and naming matters, but actual operations are a little better researched.
307--->'''Jeff 'Joker' Moreau:''' It takes skill to make a ship bank in a vacuum. Don't think it doesn't.
308* In ''Franchise/{{Pokemon}}'', the [[OlympusMons Legendary Pokemon]] of Space, [[DraconicAbomination Palkia]], is part Water-Type.
309* The videogame ''VideoGame/RogueGalaxy'' took this to the extreme end. All of the space ships are literal wooden ships, complete with masts, anchors and the like -- except with rocket engines and forcefields built into them. They also have various interstellar lifeforms that look just like sea creatures.
310* ''VideoGame/StarFox1'': Sector Y is filled with wildlife that wouldn't be out of place in an ocean. Creatures that resemble jellyfish, manta rays, and even a whale can be found.
311* The PC game ''VideoGame/StarGeneral'' plays UsefulNotes/WorldWarII [[RecycledINSPACE IN SPACE]] for all it's worth, hardly surprising considering that the same developers brought us ''Panzer General'' and its successors. Not only do all the ships correspond almost exactly with their UsefulNotes/WorldWarII namesakes, some of the factions seem to be {{Fantasy Counterpart Culture}}s for various combatants from UsefulNotes/WorldWarII, including [[{{Anvilicious}} incredibly obvious]] [[ANaziByAnyOtherName Space Nazis]].
312* The ''VideoGame/StarOcean'' series uses this in the title. The space portions are also clearly based on ''Franchise/StarTrek.'' The [[VideoGame/StarOcean1 first game]] even starts with a snippit of spoken dialogue taken directly from ''Star Trek'' -- in English no less!
313* The ''VideoGame/StarControl'' games can't quite decide what to do with this trope. Inertia and gravity wells play a big part in combat tactics, but combat takes place in 2-D plane. Also, most ships are equipped with forward-firing weapons which make combat much like an OldSchoolDogfight, but a few ships have side- or turret-mounted weapons that are great for broadside attacks. Finally, despite operating in a frictionless environment, different ship types have different top speeds (which can be exceeded with a gravity slingshot maneuver). ''Star Control 2'' takes this even further when traveling through its [[AnotherDimension different dimensions]]. In normal space, the flagship uses very little fuel and generally relies more on inertia than continuous propulsion. Its top speed is still proportional to the number of thrusters, though. [[SubspaceOrHyperspace Hyperspace]], on the other hand, is much more oceanic; the ship must continually expend fuel to move. Quasispace is an odd mash-up of the two which still has friction but somehow doesn't require fuel for propulsion.
314* In the game ''VideoGame/SuperMarioGalaxy'', [[BigBad Bowser]] actually travels through outer space aboard what appears to be a flying sailing ship (which first appeared in the game ''VideoGame/SuperMarioBros3'').
315* ''VideoGame/SwordOfTheStars'' uses the navy based naming conventions for ships, among some other standard features of this trope. In addition, the Whale people Liir take these descriptions further, describing their soldiers and explorers as "black swimmers", among other analogies.
316* An option in the PC game ''VideoGame/{{Terminus}}'', depending on the player's choice of "realism". The game features an actual sliding scale by which to set how realistically the ships move in space. If set to "Newtonian", there is no friction and thus constant motion does not require constant acceleration. Stopping requires using reverse thrust, and a ship's mass affects how well this works (trying to stop a cargo hauler full of ore will take minute at least). You can even overaccelerate and tear your ship apart, though they do give a max safe velocity. TwoDSpace still applies, though.
317* ''VideoGame/{{Traveller}}'' Also has this heavily for the terran, er, imperial side. Naval style commands were for military ship crews, traders require ship's papers (an amusing bit of fluff has a crew wondering why it's called papers if it's all on computers), Captain and all the attendant ranks as well. Smaller ships would be called boats, and have gigs to pick up crew from larger ships.
318* ''VideoGame/TreasurePlanetBattleAtProcyon'', just like the film it is a sequel to, is a literal example of this as space in this game contains: islands, currents, [[{{Space Whale}} whales]], fish, [[{{Space Pirates}} pirates]] and submarines capable of hiding under the 'surface'.
319* Virgin Victory, CENTINELS spaceship from ''VideoGame/TheWonderful101'' has sails on her. They don't do anything.
320* ''VideoGame/{{X}}'': This is mostly ignored in the series apart from Space Friction and Space Clouds, but there is the odd quirk that the majority of capital ships have their anticapital guns on the forward and flank batteries, with the flak guns above, below, and astern. Certain forum members also have a tendency to use nautical terms like port and starboard. Also avoided in that the Terrans use army ranks for their space forces instead of navy. Kyle Brennan, the PlayerCharacter of ''X: Beyond the Frontier'', holds the rank of {{Major|lyAwesome}}, while ''X3: Terran Conflict's'' Terran plot has you working under the overall command of General Ishiyama.
321* ''VideoGame/YookaLaylee'': Inverted in the Galleon Galaxy level. It's a GangplankGalleon-themed level, set on a body of water, dotted with islands that have a lot of space-themed elements, including characters who dress and act like they're in a RaygunGothic SpaceOpera. For example, you can transform into a galleon, but it's called a spaceship. Islands that are a short swim away are treated as separate planets.
322[[/folder]]
323
324[[folder:Webcomics]]
325* The trope is referenced in [[http://www.irregularwebcomic.net/2061.html this]] ''WebComic/IrregularWebcomic'' strip, with the [[LampshadeHanging obligatory link to this page]], where the NASA worker assures the (soon to be literally) AscendedFanboy that [[ArtisticLicenseSpace that's not how space works]].
326* ''WebComic/{{Pockett}}'' is built on this trope, complete with a sea-captain type space captain, tradional pirate syntax, and common navy crew protocol.
327* Used to great effect in ''WebComic/SecondEmpire'', in which a second-hand [[Series/DoctorWho Dalek]] warship designed for slow bombing runs utterly [[CurbStompBattle curb stomps]] [[SugarWiki/MomentOfAwesome a fleet of attacking fighters and a much more heavily armed enemy cruiser]] merely by having the captain realize the ''immense'' possibilities the aversion of this trope affords.
328* The ''WebComic/SluggyFreelance'' takes this trope to extremes, with spaceships that have [[SpaceSailing big honking sails on them]]. While solar sails are in fact a reasonably scientific idea, they probably wouldn't be slung on masts of craft which were basically spacefaring galleons, leaning instead towards thin sheets, many hundreds of kilometers across, designed to [[strike:catch particles of the solar wind]] reflect photons. The characters are not in outer space in those ships, but rather in a kind of backwards universe where normal physics do not apply uniformly. It's referred to as "Timeless Space", and there is not only gravity and an atmosphere but also an ocean beneath them -- but touching that ocean will cost a character all of their time and effectively kill them. They think, at least.
329[[/folder]]
330
331[[folder:Web Original]]
332* Mentioned by name in #2 of ''Website/{{Cracked}}'''s [[http://www.cracked.com/article_17392_6-sci-fi-movie-conventions-that-need-to-die_p2.html 6 Sci-Fi Movie Conventions (That Need to Die).]]
333* ''Podcast/TheEndlessNight'' is a podcast about SpacePirates, which is chock-full of nautical comparisons -- from borrowing the names of famous sailors for main characters (such as Nemo, Odisseus, and Ishmael) to the titles of the episodes.
334* In ''Roleplay/NexusGate'' space is treated very much like an ocean. Why there are even space pirates who patrol the stars!
335[[/folder]]
336
337[[folder:Western Animation]]
338* Parodied on ''WesternAnimation/BackAtTheBarnyard''. Otis and Pip are in outer space, with no idea of how to pilot the space shuttle they are in. Pip makes a remark about how, "that ship has sailed." Otis acts as if this reference to ships gave him an idea, saying, "Wait a minute? Ship? Sailing?" But then he admits, "No, never mind, I've got nothing."
339* ''{{WesternAnimation/Futurama}}'':
340** One episode focuses on a space cruise on a space ship called the ''Titanic.'' Fry wonders at one point if they hit a space dolphin, while Zapp Brannigan (the captain of the ''Titanic)'' makes as many comparisons between space and the ocean as possible.
341-->'''Zapp Brannigan:''' Comets -- the icebergs of the sky!
342** There's also an episode where the Planet Express Ship starts {{Space Whale}}ing.
343** Another episode describes a cluster of SpaceClouds with its own lighthouse.
344** In-universe, the protesters in "The Birdbot of Ice-Crataz" try to stop a tanker from maneuvering by surrounding it in a [[TwoDSpace horizontal ring]]. Of course, the Captain of the tanker simply drops down a few hundred feet (which would not be practical for an ocean-going vessel, but is trivial for a space-going vessel) and flies off. The protesters (including Leela, who is the Captain of her own ship) shame-facedly admit that they never thought of that.
345* ''WesternAnimation/StarWarsResistance'': The Colossus is somewhat of an inversion... a starship refueling station on the surface of a literal ocean, on an ocean planet. [[spoiler:By the end of Season 1, it is no longer on the ocean...]]
346[[/folder]]
347
348[[folder:Real Life]]
349* This tradition has gone on so long that assuming Earth does ever manage create routine space flight, it is almost certain that this trope will be [[{{Defictionalization}} Defictionalized]].
350* There are [[http://en.wikipedia.org/wiki/Solar_sail some fairly recent advances in space travel]] that look straight out of this trope. Same principle, but it'd probably look more like a parachute. Given that even a normal sail is as much a wing as it is a sail, not only SpaceIsAir, but Ocean Is Air ar well.
351* It is a possibility that the Navy might take over space faring expeditions because they already function on a tradition of being out at sea for long stretches of time living off of the resources on the ship, whereas the Air Force eventually has to get their air crafts back on the ground to refuel. Though in the event of any such Space version of the regular Military Forces there might be room for Joint Military Task Forces or even have the Air Force adopt Naval Traditions to avoid having authority stripped from them in Outer Space.
352** The recently-created US Space Force is a split-off from the Air Force. While they are still figuring things out, they are going to be under the Department of Air Force (just how the Marines are under the Department of Navy) and using Air Force ranks. However, the Space Force doesn't operate manned space vessels yet, so who knows what might change in the future.
353* On the Apollo 12 mission (2nd lunar landing), the mission insignia featured a clipper ship, and the service module was named Yankee Clipper. The Lunar Module was named Intrepid, multiple US Navy ships have also had this name over the years. This was to highlight the naval service of the three crewmen.
354* Astronaut and U.S. Air Force officer David Scott named the Apollo 15 Command Module Endeavour after Captain James Cook's ship. He felt that the Apollo 15 voyage was similar to Cook's in that they were both travelling to unexplored areas to discover new things. All other U.S. moon landings were commanded by naval officers or former naval officers.
355** The Space Shuttle orbiters -- ''Columbia, Challenger, Discovery, Atlantis'', and ''Endeavour'', plus the prototype ''Enterprise'' -- were all named after ships as well. Technically, the ''Enterprise'' was named after the spacecraft from ''Star Trek''(thanks to a massive letter-writing campaign by millions of Trekkies), but it does share its name with several American warships.
356* The Apollo astronauts used celestial navigation during their missions, something that sailors have been doing for centuries.
357** Early ballistic missile systems like Snark and Trident also used automated celestial navigation (using cameras fixed on particular stars) to improve their accuracy in the days before GPS and other more modern forms of guidance.
358* In English, the very word "astronaut" is itself a [[{{Defictionalization}} Defictionalized]] [[http://www.etymonline.com/index.php?term=astronaut&allowed_in_frame=0 example]]; it ends in "naut". As in "nautical". "Astronaut" quite literally means "star sailor!"
359** The same goes for the Soviet and Russian term "cosmonaut" (except that it means, well, "cosmos sailor").
360** The more rarely used Chinese equivalent "Taikonaut" also contains the "naut" syllable
361* Much of modern space travel is derived from aviation, and much of ''that'' is [[TheSkyIsAnOcean derived from nautical tradition]], partially because many of the early aircraft were seaplanes (because there were no runways yet). Many of the job titles associated with flying (Pilot, Stewardess, Purser, TheCaptain) and much of the other terminology was drawn from direct analogs in the seafaring trade (for instance, the fact that airplanes operate out of air''ports''). Naturally, this all extended to space travel wherever applicable.
362* The left and right side of a spacecraft are referred to as "port" and "starboard" respectively, such as during the launch of NASA's ''Orion'' spacecraft on 5 December 2014. This is actually carried over from airplanes, which also use these words.
363* Since spacecraft aren't usually mass-produced the way aircraft or land vehicles are, a set of spacecraft built to the same specification is sometimes referred to as a "class", much like with ships. For example, two series of US Air Force spy satellites were code-named the ''Gambit''-class and the ''Hexagon''-class.
364* NASA commissioned the artist Mark Rademaker to create a "realistic" depiction of what a faster-than-light starship might actually look like. Mark worked with Dr. Harold White, Advanced Propulsion Team Lead for the NASA Engineering Directorate, and the ship came out looking pretty realistic all things considered, but it still had [[http://www.theverge.com/2014/6/13/5806104/nasas-warp-drive-spaceship-concept-enterprise a great big bridge perched on the front with windows and a deck oriented parallel to the ship's axis of thrust.]]
365* When preparing the public communications just in case the Apollo 11 landing failed (often referred to as the "[[http://watergate.info/1969/07/20/an-undelivered-nixon-speech.html greatest speech never given]]"), the last prepared section was for a clergyman to perform the rite for Burial at Sea, with "commend their bodies to the deep" changed to "...the utmost deep."
366* One of NASA's future Large Strategic Science Missions (top-tier, formerly Flagship missions) will be the "[[https://en.wikipedia.org/wiki/Europa_Clipper Europa Clipper]]". [[JustifiedTrope Justified]] as said probe's main target will be Jupiter's moon Europa, thought to harbor an ocean under a thick crust of ice.
367* The [[https://en.wikipedia.org/wiki/Outer_Space_Treaty Outer Space Treaty]] makes space to be treated essentially as international waters.
368[[/folder]]
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