Types of amphibious vehicles

What are the types of amphibious vehicles?

There are three types of amphibious vehicle: land-first amphibians, water-first amphibians and dual-mode amphibians. The type is set by two things that can be checked from a vehicle's published top speeds: whether it planes on water, and whether it exceeds 20 mph (32 km/h) on land.

No type is better than another. Each one answers a different need, and the builders of all three have moved the idea forward. This guide describes them. It does not rank them.

What is a land-first amphibian?

A land-first amphibian is an amphibious vehicle that travels on water without planing or riding on hydrofoils. It is also called a floater: a car that floats.

A land-first amphibian's hull stays in the water and pushes through it, so its water speed is held down by the length of the hull. Of the 271 land-first vehicles in the encyclopedia's data with a published water speed, the median is 5.6 mph (9 km/h) and the fastest reaches 18.6 mph. On land the same vehicles run from slow tracked carriers to cars that hold highway speed.

Land-first is the largest type by far. It includes the Amphicar 770, the wartime DUKW and Schwimmwagen, most military amphibians, amphibious all-terrain vehicles and the duck boats used for city tours. A land-first design suits a job that is mostly on land, with a river, a lake or a surf zone to cross.

What is a water-first amphibian?

A water-first amphibian is an amphibious vehicle that planes or rides on hydrofoils on water and does not exceed 20 mph (32 km/h) on land. It is also called a land crawler: a boat that crawls.

A water-first amphibian is a planing boat first. Retractable wheels or tracks let it drive down a beach or a ramp into the water and back out again, with no trailer and no tow vehicle. In the encyclopedia's data, water-first amphibians reach 27.6 to 64 mph on the water, and their median top speed on land is 5.6 mph (9 km/h).

The best known water-first amphibians are the Sealegs boats from New Zealand, built since 2004, and the tracked Iguana boats from France, built since 2011. Several other boat builders now fit similar wheel systems. A water-first design suits an owner who wants a full boat and keeps it at the water's edge.

What is a dual-mode amphibian?

A dual-mode amphibian is an amphibious vehicle that planes or rides on hydrofoils on water and exceeds 20 mph (32 km/h) on land.

In plain words, a dual-mode amphibian shares the street with cars and the water with boats. It drives in traffic on the public streets where it is legal, and it runs on plane alongside other boats on the water. In each place it does what a single-purpose vehicle of its class does: a street vehicle on the road, a planing boat on the water.

A dual-mode amphibian needs a hull that planes, enough power to lift it onto plane, and wheels that move out of the water flow. The encyclopedia's data holds 23 dual-mode amphibians, and most were prototypes or one-offs. Those sold to the public include the Gibbs Aquada (2003), the Hydra Spyder (2005), the Gibbs Quadski (2012), the WaterCar Panther (2013) and the WaterCar EV (2024).

The dual-mode type is set by the two tests alone. It says how a vehicle moves, and it does not say whether the vehicle is legal on the road. The Quadski, for example, passed both tests and was sold for off-road use only. Legal status is a separate question, covered under certified dual-mode amphibians.

How do you tell which type a vehicle is?

Ask two questions, and answer both from the vehicle's published top speeds.

1. Does it plane or ride on hydrofoils on water? If not, it is a land-first amphibian.
2. Does it exceed 20 mph (32 km/h) on land? If it planes and does not, it is a water-first amphibian. If it planes and does, it is a dual-mode amphibian.

Planing is shown by the maker, by a test, or by a top water speed of at least 25 mph (40 km/h).

Why is the land test 20 mph?

The line comes from the road rules, not from this guide. United States federal rules define a low-speed vehicle as a four-wheeled motor vehicle with a top speed of more than 20 mph (32 km/h) and not more than 25 mph (40 km/h) (49 CFR 571.3; the equipment standard is 49 CFR 571.500). That is the slowest class of motor vehicle in the federal safety standards, so more than 20 mph is the point where driving on public streets with other traffic begins.

Why is the water test planing?

A hull that stays in the water is held near its hull speed, which is about 1.34 times the square root of its waterline length in feet, in knots (hull speed). For a 20-foot (6 m) waterline that is about 6 knots, or 7 mph (11 km/h). A planing hull rises onto the surface as it gains speed, and from that point it handles, turns and covers distance like other planing boats. A hull the size of a vehicle cannot reach 25 mph (40 km/h, or 21.7 knots) without planing or hydrofoils, which is why that speed counts as evidence. The glossary explains planing and displacement hulls.

Which speed figures count?

The maker's published top speed counts. Where an independent test differs, the table shows the test figure and says so. The type comes from the numbers, never from the body style or from how a maker describes its vehicle. A dual-mode amphibian can be built on a boat hull or on a car body. A vehicle with no published speed for land or for water is left unclassified until a figure is found.

What is a certified dual-mode amphibian?

A certified dual-mode amphibian is a dual-mode amphibian that is street legal as sold by its maker and is built and certified as a boat under its market's marine standards.

Performance is one question and legal status is another. A dual-mode amphibian is certified when it meets both of these as it leaves its maker:

1. Street legal as sold. The maker certifies it for public roads under a recognized vehicle class and issues its vehicle identification number. A vehicle that becomes road legal only when its owner registers it as a kit or as a specially constructed vehicle does not count.
2. Built and certified as a boat. In the United States that means built to U.S. Coast Guard standards with a Hull Identification Number, and, where the maker holds it, NMMA certification to ABYC standards. In Europe it means CE marking under the Recreational Craft Directive.

Certified dual-mode is a tier inside the dual-mode type, not a fourth type, because it measures something different. The types describe how a vehicle moves. The tier describes whether it is legal as both a road vehicle and a boat.

The WaterCar EV, made by the publisher of this guide, is an example. WaterCar sells it as a street-legal low-speed vehicle under Federal Motor Vehicle Safety Standard 500, with its own vehicle identification number, and its hull is NMMA certified and carries a Hull Identification Number (WaterCar specifications). We are checking which other vehicles on sale today meet both parts, and each one will be listed here as it is confirmed.

How common is each type?

As of November 13, 2026, the research behind this encyclopedia covers 784 amphibious machines. Of those, 72 are hovercraft or amphibious aircraft, which are separate families. Another 206 are leads known from a single weak source, and 62 have no published speed for land or for water. The other 444 are amphibious vehicles that can be classified:

• 86%Land-first: 382 vehicles
• 9%Water-first: 39 vehicles
• 5%Dual-mode: 23 vehicles

Most amphibious vehicles ever documented are land-first. Water-first amphibians are a young group: nearly all of those in the encyclopedia's data date from 2004 or later. Dual-mode amphibians are the rarest type.

Each mark is one vehicle with both speeds published (304 vehicles). Hover over a mark to see its name and figures. Speeds are published top speeds; the tables below give the source for each.

Common questions

Is an amphibious car the same as an amphibious boat?

No. An amphibious car is built on a car body and an amphibious boat is built on a boat hull, but the body does not set the type. Most amphibious cars are land-first: they drive like cars and float at about 6 mph (9 km/h). Most amphibious boats are water-first: they plane like boats and move at about 6 mph (9 km/h) on land. A dual-mode amphibian passes both tests, whichever way it was built.

Are hovercraft and seaplanes amphibious vehicles?

They are amphibious, and they belong to separate families. Hovercraft ride over land and water on a cushion of air. Amphibious aircraft, such as the Consolidated PBY Catalina and the ICON A5, take off from and land on both water and runways. The three types on this page apply to wheeled and tracked amphibious vehicles. Together the three families make up amphibious mobility: travel that crosses between land and water in one machine.

Is a military amphibious vehicle a separate type?

No. Military is a use, like rescue, tours or personal travel. A DUKW or an AAV7 is a land-first amphibian that was built for military use, and the same two tests apply to it.

Are amphibious cars street legal?

It depends on the vehicle and the country. Some amphibious vehicles are certified for public roads by their makers. Some are registered one at a time by their owners. Amphibious boats and most amphibious all-terrain vehicles are not road vehicles at all. In the United States, a four-wheeled vehicle with a top speed above 20 mph and not above 25 mph can qualify as a low-speed vehicle, and each state decides which roads those may use.

Where does the word amphibious come from?

It comes from the Greek amphibios, "living a double life", from amphi (both) and bios (life). The timeline follows the idea from 1805 to today.

Which amphibious vehicles are dual-mode?

These are the dual-mode amphibians in the encyclopedia's data with at least one good source, oldest first. Most never went on sale.

Speeds are in miles per hour (1 mph is 1.609 km/h) and are the maker's figures unless a note says otherwise. Vehicles reported by a single weak source are kept as leads and are left out of the counts and of this table until a second source is found.

Which amphibious vehicles are water-first?

Model ranges from one builder are grouped where the builder publishes one set of figures.

Which amphibious vehicles are land-first?

There are 382 land-first amphibians in the encyclopedia's data. This table shows the 99 with both speeds published and at least two sources that agree.

How this guide was made, and how to cite it

WaterCar, a maker of dual-mode amphibians, publishes this guide as part of the Amphibious Encyclopedia. WaterCar's own vehicles are classified by the same two tests as every other vehicle, from the figures it publishes.

The data comes from maker specifications, museum and government pages, period press and published tests, gathered for the encyclopedia through November 13, 2026. Knots and km/h were converted to mph before the tests were applied. Vehicles that rest on a single weak source are kept as leads: they are not counted and not shown.

Builders, owners and historians: if a figure is wrong or a vehicle is missing, tell us and include a source. Corrections are welcome from everyone, including other makers.

Version 1.2, November 13, 2026. Version 1.1 added a second research pass: more vehicles, corrected figures, and counts that leave out single-source leads. Version 1.2 leaves the Type 05 unclassed, because its sources disagree on whether it planes. To cite: WaterCar. "Types of amphibious vehicles." The Amphibious Encyclopedia, version 1.2, November 13, 2026. https://www.watercar.com/amphibious/types/