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The vehicle in those videos is the U.S. Navy’s Landing Craft, Air Cushion (LCAC), a ship-to-shore connector that carries Marine Air-Ground Task Force personnel, weapons, equipment and cargo from an amphibious ship across the surf and onto a beach. It does not fly. It rides on a pressurized cushion of air that lifts its body off the surface, which lets it cross water, breaking surf and sand with the same machine. That cross-terrain ability is the point of the design, but it is not a promise that the craft can go anywhere in any sea. The sections below separate what the official sources establish from what a dramatic clip can suggest.
What the craft is and what it is for
“Hovercraft” is the everyday term, and it is accurate in the sense that matters: the LCAC is a non-displacement craft. Instead of pushing a conventional hull through the water, it sits on air held beneath it. The Navy operates it, and the Marine Corps uses it to move forces off ships. The Navy’s fact file describes its mission as ship-to-shore movement, and it notes that the craft can carry an M1 tank.
In practical terms, the LCAC is a connector. It links the amphibious ship, which stays offshore, to a landing area ashore. Ground forces and equipment that would otherwise need to be unloaded piece by piece can move in one craft, and the Marine Corps doctrine on LCAC employment describes its role in amphibious operations and other missions.
How an air cushion gets it across water, surf and sand
The LCAC’s cross-terrain behavior comes down to a sequence that the official descriptions support. The stages below follow the mission as the Navy and Marine Corps describe it; they are not a step-by-step operating manual.
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- Leave the amphibious ship. The craft moves from the ship toward the shore carrying Marines, vehicles or cargo.
- Lift on the cushion. Air held beneath the craft supports its weight, so the body rides above the surface rather than pushing through it.
- Cross the surf zone. The same cushion carries the craft through breaking surf, where a conventional hull would be slowed by the waves.
- Cross the beach. The craft continues over sand rather than stopping at the waterline.
- Land beyond the high-water mark. The objective is a landing point ashore, not just the edge of the beach.
This is why the LCAC is judged on the transition from ship to shore, not only on open-water speed. Speed matters, but the craft’s value is that it does not have to stop at the waterline.
Official specifications, by source and variant
Two official sources give different kinds of numbers, and they should not be merged. The Navy’s fact file gives a general payload range for the LCAC. The Marine Corps’ 2024 doctrine gives a detailed table for the LCAC 100 variant. The table below keeps each figure tied to its source, date and variant.
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- This product is not a toy
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| Item | Value | Variant | Source and date |
|---|---|---|---|
| Payload | 60–75 tons (range) | General LCAC, not tied to one variant | U.S. Navy fact file, last updated 14 October 2021 |
| Example load | M1 tank | General LCAC | U.S. Navy fact file, last updated 14 October 2021 |
| Payload capacity | 74 short tons (67.13 metric tons; 148,000 pounds) | LCAC 100 | U.S. Marine Corps, April 2024 (NTTP 3-59.3M/MCRP 2-10.3) |
| Troop capacity | 26 combat-equipped troops | LCAC 100 | U.S. Marine Corps, April 2024 |
| Crew | Five enlisted personnel | LCAC 100 | U.S. Marine Corps, April 2024 |
| Range | 86 nautical miles at 35 knots, with payload | LCAC 100 | U.S. Marine Corps, April 2024 |
| Maximum speed | 50 knots | LCAC 100 | U.S. Marine Corps, April 2024; exceeding 50 knots requires a safe engineering and operations waiver |
Because the LCAC 100 figures come from a different source and context than the Navy’s payload range, they should be read as the specifications of one variant. They do not describe every LCAC in service. Where a number is not stated for a particular variant in the sources reviewed, it is not stated here either.
Where it can go, and where it cannot
The Navy states that air-cushion technology gives the LCAC access to more than 70 percent of the world’s coastline, compared with about 15 percent for conventional landing craft. This is a Navy-published comparison from its 2021 fact file. The sources reviewed do not include an independent study or a published method behind the percentages, so it should be cited as the Navy’s figure rather than as a measured universal.
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The craft’s reach is also conditional. The Marine Corps doctrine says that operations at over-the-horizon distances depend on load and sea conditions. The same doctrine lists factors that must be considered: water depth, significant wave height, ambient temperature at the engine air inlets, total craft weight, and forward speed. It also states that the lightweight structure of the craft has speed limits tied to gross weight and wave conditions.
In practice, this means the 50-knot maximum is an upper bound, not a routine speed. A heavy load in rough seas will not allow the craft to run at its top speed, and the published range of 86 nautical miles applies with payload at 35 knots, not at every speed or load combination.
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Fleet modernization: what the recent releases do and do not show
The Navy’s Ship-to-Shore Connector (SSC) program is replacing and supplementing the existing fleet. A Navy acquisition release on the program quotes Melissa Kirkendall, Deputy Portfolio Acquisition Executive Maritime for Expeditionary and Mine Warfare, saying: “The SSC program delivers the speed, flexibility and mobility our Sailors and Marines require to execute expeditionary operations around the globe.” A later release reports Navy acceptance of delivery of LCAC 117 from Textron Systems.
An individual delivery shows that the program is producing craft. It does not, on its own, establish how many LCACs are in service or when the transition from older craft will be complete. Readers looking for fleet counts should consult current Navy publications.
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What to look for when you watch the footage
- Identify the craft. The official name is LCAC. A clip labeled as a Marine Corps hovercraft is most likely an LCAC, but check the caption or the source for the variant.
- Separate the cushion from flight. The craft is supported by air beneath it. It is not lifting like a helicopter, and it cannot climb or descend freely.
- Note the setting. A clip that shows surf and sand is demonstrating the ship-to-shore role. It does not show the craft operating in every sea state or with every load.
- Check the date. Official figures in this article come from sources dated 2021 and 2024. Variants, loads and fleet composition can change after those dates.
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