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In real life, cars tend to [[TrappedInASinkingCar sink in water]]. This however, can be averted in fiction ([[TruthInTelevision and in Real Life]]). This trope applies whether a normal car can inexplicably float or work as a submarine, or a modified car can do this (more realistic). These can overlap with CoolCar, the AllegedCar, and WhatAPieceOfJunk. Contrast to SisterTrope, FlyingCar. SubTrope of WeDontNeedRoads.

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!!Examples

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[[folder:Advertising]]
* The trope picture is from a 1967 Volkswagen advertising campaign. The beetle could stay afloat for several minutes more than a normal car due to its quality engineering and unique platform frame chassis design. The [[http://www.youtube.com/watch?v=1qB0lb401ZU TV ad]] shows it even better. Beetles have been known to float for more than ten minutes. The simple expedient of coating the door seals with heavy grease will allow a Beetle to float even longer.
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[[folder:Anime & Manga]]
* ''Anime/SpeedRacer'': The Mach 5 can not only float but can be a submarine for short periods of time.
* In ''Manga/KokoroLibrary'' lina drives a VW Schwimmwagen (see RealLife section). Comes in handy once or twice when she forgets to look where she is driving and ends up in the riwer.
* Seta's van from ''Manga/LoveHina'' can function as a submarine for no apparent reason, but considering he's such a horrible driver, it's probably in his best interest.
* Daisuke's CoolBike from ''Anime/HeatGuyJ'' can easily convert from motorcycle to jetski, making it capable of chasing vehicles on land or water.
* The first ''{{Anime/Patlabor}}'' showed that with the addition of some relatively straightforward flotation systems Section 2's command cars (and even more impressively) Labor trailers can operate amphibiously. Quite well too given the rough seas that they successfully navigated.
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[[folder:Films -- Animation]]
* In ''WesternAnimation/AGoofyMovie'', Goofy's [[TheAllegedCar AMC Pacer]] floats down a huge western river with two people on top. It's only the waterfall that beats it.
* In ''WesternAnimation/{{Cars}} 2'', the Film/JamesBond pastiche Finn [=McMissile=] transforms into a hydrofoil and a submarine.
* Lucy's car in ''WesternAnimation/DespicableMe2'' drives off a pier and turns into a submarine.
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[[folder:Films -- Live-Action]]
* In ''Film/HerbieRidesAgain'', the bug is shown to float and propel itself in the Pacific for around 30 minutes. But, this is [[CoolCar Herbie]]. Obviously inspired by the VW ads.
* ''Film/ChittyChittyBangBang'' can float, as well as [[FlyingCar everything else]].
* In ''Film/IndianaJonesAndTheKingdomOfTheCrystalSkull'', an original GAZ 46 amphibious vehicle (see RealLife section) is used as a getaway car down a river and over three waterfalls.
* In ''Film/TheSpyWhoLovedMe'', Film/JamesBond's [[CoolCar Lotus Esprit]] becomes a sub. Eventually de-fictionalized; see both RealLife and Live-Action TV.
* ''Film/{{Condorman}}'': The racecar escapes pursuit by inflating floats underneath and "driving" over water.
* In ''Film/BluesBrothers2000'', the updated Bluesmobile can function underwater.
* In ''Film/ThePresidentsAnalyst'', an Amphicar (see RealLife below) is on board a motor yacht owned by the Canadian Secret Service and commandeered by a Russian spy, and used for a trip onto land.
* Mr. and Mrs. Cortez's SUV from ''Film/SpyKids''.
* ''[[Film/TheCannonballRun Cannonball Run II]]'' has one team's car (a Mitsubishi Starion) become submersible after it's driven into a lake. Interesting to note that the driver is played by Richard Kiel, who played "Jaws" in ''Film/TheSpyWhoLovedMe''.
* The screwball comedy ''What's Up Doc'' climaxes in a car chase where the protagonists lead everyone after TheMacGuffin off a pier and into San Francisco Bay. Fortunately for our heroes they are driving a Volkswagen, which floats.
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[[folder:Literature]]
* The Polish adventure novel series, ''Pan Samochodzik'' (Mr. Automobile), was about an amateur detective whose [[WhatAPieceOfJunk car]] happened to have such a capability.
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[[folder:Live-Action TV]]
* The Creator/DiscoveryChannel show ''Monster Garage'':
** It featured the cast attempting to turn a Mazda Miata into one of these. It worked until the air intake (placed too close to the nose) took in water, killing the engine.
** However, they previously succeeded with a Volkswagen New Beetle which they converted into an air boat although the "water bug" had a tendency to bury its nose in the water due to how hard Jesse was running the fan.
** They had another success when they converted a small school bus into a pontoon boat.
* ''Series/TopGear''
** One of the infamous [[WackyRacing Challenges]] had the three presenters tasked with converting the vehicle of their choice into something capable of driving to and across a reservoir. Apparently the fact two of the resulting contraptions were qualified successes as opposed to the usual [[EpicFail hilarious failures]] went to their heads, as a few seasons later they decided to refine their designs and make an attempt at ''the English Channel''. [[spoiler:Clarkson's pickup truck actually made it across.]]
** In the ''50 Years of James Bond'' special, Hammond pilots a working version of the submersible Lotus Espirit from ''The Spy Who Loved Me''.
** Then in 2013, the [[Series/TopGearUS Americans]] got in on the act building their own amphibious cars and attempting to cross Lake Ontario with them. [[spoiler:Only Rutledge succeeded.]]
* Creator/LarryTheCableGuy met someone who built a working part-boat part-car vehicle on ''Only in America''. Also counts as a RealLife example.
* In the series ''Series/{{Viper}}'', after being destroyed and rebuilt the car that the series is named after is able to covert into a hovercraft.
* In ''Series/KnightRider 2008'', the new KITT can turn into a submarine.
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[[folder:Print Media]]
* ''National Lampoon'' ran [[http://www.yourememberthat.com/media/7863/National_Lampoon_Ted_Kennedy_VW_Ad/ a Parody version]] of the VW ad, basically saying that if Ted Kennedy had been driving a VW he wouldn't have had that trouble in Chappaquiddik.
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[[folder:Puppet Shows]]
* The eponymous ''Series/{{Supercar}}''.
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[[folder:Tabletop Games]]
* ''TabletopGame/{{Warhammer 40000}}'' : the Imperial Chimera, much beloved of the Guard and Inquisition, has the Amphibious special rule that allows it to treat water as ordinary terrain on the tabletop. In the fluff, the Space Marine Rhino chassis (which is used for their [=APCs=] and Predator tanks) is capable of driving on the surface of a lake or sea without difficulties; one segment featured a tank duel between loyalist and Chaos Predators at the bottom of the ocean!
* Classic ''TabletopGame/{{Traveller}}'', Paranoia Press supplement ''SORAG''. The Amphibious Ground Car (a.k.a. the "Mudpuppy") can travel at 88 k.p.h. on the road and 21 k.p.h. (11 knots) in the water using its twin propellers.
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[[folder:Toys]]
* ''Franchise/{{Bionicle}}'': the Vahki Transport used by the Toa Metru to travel to and from Metru Nui to Mata Nui was conveniently seaworthy. It was, however, mostly held up by the Matoran capsules attached to it, and later by pieces of dried-up plant matter. Its lack of wheels meant there were no holes on its hull for the liquid protodermis to pour in.
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[[folder:Video Games]]
* Amy Rose in ''VideoGame/SonicR'' drives a car which has the ability to float on water.
* In ''VideoGame/SpyHunter'', you can drive into the water and your car automatically becomes a boat.
* The cars in ''VideoGame/DiddyKongRacing'' can stay afloat and even move in water, albeit extremely slowly.
* The Franchise/JamesBond game ''VideoGame/{{Nightfire}}'' includes an Aston-Martin that converted into a submarine.
* An 8-bit licensed game of ''WesternAnimation/{{MASK}}'' turned the "Gator" vehicle (a Jeep with an ejectable boat) into a Jeep that ''turned'' into one, so it could actually be usable.
* ''VideoGame/MarioKart''
** The Karts in ''VideoGame/MarioKart7'' can turn into submarines if any of them land in the water.
** But driving underwater was possible in ''Mario Kart: Super Circuit'' too, although it was extremely slow and you only had little while before [[BottomlessPitRescueService Lakitu]] fishes you out anyways.
* A few ''VideoGame/ChoroQ'' games allow you to attach parts that make your car amphibious. Good thing since some of the courses have water sections.
* In ''[[VideoGame/SegaSuperstars Sonic & All-Stars Racing: Transformed]]'', the race cars can transform into watercraft.
* Any vehicle with the Amphibious property in ''CommandAndConquerRedAlert3''. A few of them (such as the Allied Riptide ACV) are hovercraft, some are regular boats that sprout treads or legs on land, but the vast majority are ordinary-looking trucks and tanks that merely extend a few pontoons and motor on.
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[[folder:Western Animation]]
* In ''WesternAnimation/HeathcliffAndTheCatillacCats'', the Cadillac could convert into a boat.
* Dr Claw in the ''WesternAnimation/InspectorGadget'' cartoons could turn the [[{{Thememobile}} Madmobile]] into a submarine ([[FlyingCar and an airplane]]).
* The Belgian series ''Kapitein Zeppos'' also had an amphibious car.
* The Commvee in ''WesternAnimation/TheWildThornberrys''.
* During a chase, ''WesternAnimation/KimPossible'' called [[GadgeteerGenius the Tweebs]] to ask if [[CoolCar the Sloth]] has aquatic modifications. After hearing the answer "sure", she tried to follow Shego and Junior into the water. Unfortunately, the Tweebs thought she'd asked if they ''could'' install aquatic modifications, and had not actually done so.
* ''WesternAnimation/{{Superfriends}}'' (1973-74) episode "The Weather Makers". The villains have a car that can operate as a speedboat.
* ''WesternAnimation/{{MASK}}'' has at least a couple of examples including Shark, a Porche 928 that turned into a submarine and Raven, a Chevrolet Corvette that can also turn into a submarine.
* The Autobots of ''WesternAnimation/TransformersAnimated'' are shwon to function in the vehicle modes while underwater.
* Both 2 Wycked and the Danger Cart are able to transform into submarines in the ''WesternAnimation/AquaTeenHungerForce'' episode "Last Dance for Napkin Lad."
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[[folder:Real Life]]
* A few real examples (excluding the Beetle) are amphibious cars like the UsefulNotes/WorldWarII Schwimmwaggen and Ford GPA, and the Soviet license copy, the GAZ 46, the TheSixties Amphicar and a host of less famous cars. Ironically, by far the most successful wasn't a car at all: it was the DUKW amphibious 2-1/2 ton truck, which are popular among military vehicle collectors and used as emergency and [[http://en.wikipedia.org/wiki/Duck_tour excursion vehicles]] even today. See the Trivia page for more details.
* The [[http://www.rinspeed.com/pages/cars/squba/pre-squba.htm Rinspeed sQuba]] is designed to behave like the aforementioned Lotus Esprit from ''Film/TheSpyWhoLovedMe.'' However, it's open-topped rather than watertight and as such, requires the passengers to wear SCUBA gear.
* At least one man has modified a sports car to also act as a speedboat, capable of going from land to water and back under its own power.
* A non-industrial example: Floating Cubans. Cubans take normal cars ([[http://www.rowand.net/Shop/MechanicalFunnyBone/1959BuickBoat/1959BuickBoat1_files/040204_boatcar_hmed_2p.hmedium.jpg often old American cars]]) and modify them so they can float across the Ocean to Miami, using propellers, buoyant oil drums and/or water sealer.
* While [[TankGoodness tanks]] usually cannot float, both the British and the Americans figured out how to make them amphibious in UsefulNotes/WorldWarII. The Americans used pontoons and the British used canvas-displacement screens. Both were using a Duplux Drive system involving two propellers added to the rear of the tank (ultimately, it was the British canvas screen design that was used in combat). The Germans, on the other hand, developed deep-water fording kits using snorkels to allow their tanks to motor across the bottom. Postwar, with tanks grown too big to be floated, several other nations also developed deep water fording systems, an idea that has since been given up as impractical.\\\
The DD Tanks, as they were called, were unfortunately not a effective as the Allies had hoped; the 30 ton Shermans that they converted were so heavy that anything more than a small ripple in the water would capsize and sink them. However, their ''psychological'' effects were enormous. In Operation Overlord, there are reports of German machine gunners who, upon seeing what they thought was a harmless boat drive out of the water and turn into a fully operational tank, actually [[OhCrap looked up from their positions with their mouths agape.]] Three out of 27 DD tanks on Omaha Beach made it ashore, but it wasn't near that bad on Juno, Utah, and Sword, where seas were calmer, and most of the tanks landed on shore, providing much needed direct fire support for infantry.
* The Japanese and later the Soviets went the other way: in addition to trying to float regular tanks with pontoons, they also built "tanks" with lightweight boat-like hulls like the Type 92 and the PT-76. Unfortunately, that meant doing without much armor. And since any vehicle that looks like a tank tends to get used like a tank, the result was "reconnaissance vehicles" that had short lifespans in combat.
* The colossal German Panzer VIII "Maus" was to weigh around 200 Tons. This being far too heavy to cross most bridges, it was instead intended to wade across rivers. Hatches and hull openings could be sealed, and the tank would be driven across the riverbed. Since the Maus used a diesel-electric transmission, the tanks could work in pairs, a second Maus on the riverbank supplying electric power to the submerged one by a cable. This eliminated the need for a snorkel, but it did nothing to address the "river bottoms are made of mud" that has defeated all similar efforts.
* [[http://en.wikipedia.org/wiki/Gibbs_Aquada The Gibbs Aquada.]]
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