This story begins back in the 1960s when an American satellite captured an image of a strange object in the Caspian Sea, Russia. It was a gigantic machine never seen before — not a plane, not a ship, but something entirely different. There was even an anecdote about it. One of the U.S. analysts studying the satellite images called the machine a monster. His colleagues joked, “The monster from Loch Ness?” Another analyst replied, “It looks more like the Caspian Sea Monster.”
That so-called Caspian Sea Monster was actually a product of Soviet technology called the Ekranoplane. This machine used ground effect to fly just a few yards above the sea’s surface, reaching speeds of up to 500 km/h (310 mph). It weighed approximately 265 tons and was the size of a Boeing 747. As with many Soviet-era designs, it was built large and powerful — equipped with ten jet engines and capable of lifting 600 tons.
The Soviets had big plans for the Ekranoplane due to its impressive performance: high speed, low radar signature, the ability to fly over naval mines, invisibility to sonar, access to shallow coastlines, and the capability to carry heavy payloads. However, it also had significant disadvantages. The jet engines were vulnerable to saltwater damage, the enormous turning radius made it difficult to avoid obstacles, and it could only operate in calm weather. It was never seen flying over rough seas, which severely limited its usability. Ultimately, the Ekranoplane project was deemed a failure and canceled. After years of testing, the machine was abandoned on the shores of the Caspian Sea, where it now serves as a museum exhibit in the Russian republic of Dagestan. If you’re curious, you can search for “Ekranoplane Lun” on Google Maps to spot it along the Caspian Sea coast.
A Few Words About Ground Effect
The ground effect in aviation occurs when an aircraft flies close to the ground, causing the air beneath its wings to compress. This reduces wingtip vortices, thereby decreasing drag and increasing lift. As a result, the aircraft can fly more efficiently. This aerodynamic phenomenon is especially useful during takeoff and landing, but it can also be leveraged to create specialized vehicles that operate above water surfaces. There’s plenty of information available on the internet about ground effect, so I won’t go into further detail here. Even birds (like pelicans) are using it all the time.
Fast Forward to 2025
Now, let’s jump ahead about 60 years from the Caspian Sea Monster’s initial trials. Aviation and technology have advanced dramatically, with significant improvements in electronics, communication, navigation, propulsion, and materials. The world has changed and so has the approach to business and technological development. It seems like the right moment to reintroduce the concept of a ground-effect vehicle for transporting people and cargo. Such a vehicle could have twice the range of an electric aircraft, transport 12 passengers plus two crew, and always land safely on water.
A small but ambitious company in Rhode Island, REGENT, is revitalizing the old concept with modern technology. Their mission is to reduce the cost and complexity of regional transportation between coastal cities. This is not another “Rhode Island Monster,” but an elegant and highly advanced vehicle —the Seaglider.
REGENT is an acronym that stands for Regional Electric Ground Effect Nautical Transport. Similar to NASA, REGENT is pronounced as a word rather than an acronym. REGENT is always capitalized.
The Seaglider: A Revolution in Coastal Transport
The Seaglider uses wing-in-ground effect to fly just a few meters above the water’s surface, combining the high speed of an airplane with the low operating cost of a boat. It boasts an impressive range — 180 miles (290 km) with current battery technology and up to 500 miles (800 km) with next-generation batteries. Even better, it can operate using existing dock infrastructure, eliminating the need for costly new facilities.
This makes the Seaglider an ideal “island hopper” for places like Hawaii or a fast transportation option for European coastal cities along the North Sea. It could also revolutionize travel between the U.K. and France, over the English Channel, offering a quicker alternative to ferries. In California, it could significantly reduce travel times between San Diego and Los Angeles. Plus, with 100% electric propulsion, it produces zero carbon emissions.
The Seaglider reaches speeds of 160 knots (300 km/h) just 3 yards (2.7 meters) above the water — a thrilling, futuristic concept. Helicopter pilots who fly to offshore platforms often describe the adrenalin rush of low-altitude, high-speed helicopter flights. For Seaglider crew, this will be the new normal.
Airplane or Boat?
A key question is whether the Seaglider should be classified as an airplane or a boat. While passengers likely won’t care, regulatory authorities will, as classification affects certification, costs, and operational regulations.
Seagliders are all-electric hydrofoiling wing-in-ground (WIG) craft, operating entirely over water and within one wingspan of the surface. Under U.S. law, this defines them as maritime vessels, regulated by the U.S. Coast Guard, with technical support from the FAA.
Unlike airplanes, Seagliders are classified as maritime vessels under Type A WIG craft regulations. They fall under the jurisdiction of national maritime authorities and international conventions overseen by the United Nations’ International Maritime Organization (IMO). In the U.S., the Coast Guard is responsible for overseeing their design, construction, and operation. Additionally, Seagliders will receive Classification Notation from an independent Classification Society to ensure safety and seaworthiness.
REGENT is collaborating with the U.S. Coast Guard to certify its first model called Viceroy Seaglider, a 12-passenger vehicle capable of 180 mph (290 km/h) and 180-mile routes on a single charge —meaning it can cover significant distances within approximately one hour.
According to REGENT, Seagliders will meet the highest safety standards, complying with both national and international regulations. Like all regulated maritime vessels, they will undergo rigorous and continuous evaluation and inspection to ensure safety, reliability, and operational excellence.
A High-Tech Cockpit
Having spent my career in aviation, I have always been fascinated by aircraft cockpits. My specialty was cockpit instruments and displays, and I even led a project to certify the first Boeing 747 Classic with electronic displays instead of traditional steam gauges. Naturally, I was eager to examine the Seaglider’s cockpit.
It is fly-by-wire, controlled with sidesticks, and features an advanced digital display suite. The sidestick is quite simple (left-right and fast-slow control) and there will be no need for trained aircraft pilots to ride those vehicles.
When Boeing introduced the 787, they proudly announced that its display area was 20% larger than that of the 777. Well, the Seaglider’s display surface is even bigger than 787. The cockpit is paperless and features:
• A three-axis autopilot
• Moving maps
• Forward-looking sonar
• Maritime radar
• Primary operational displays
• Motor control displays
• Electronic charts
• Synthetic vision mode
• Infrared camera mode
• A traffic advisory system for both marine and aerospace environments
Additionally, the cockpit windows are extremely large, providing excellent situational awareness for operators (if you want you can call them pilots).
The Future of Coastal Transport
The Seaglider model Viceroy is designed to carry two crew members and 12 passengers, with the potential for a VIP luxury configuration (less passengers more luxury). And this is just the beginning. Several strategic investors, including Japan Airlines, Alaska Airlines, Hawaiian Airlines, and Mesa Airlines, have already backed REGENT’s vision. Normally, these companies (airlines) invest in airplanes, but they clearly see the potential of this new category — whether you call it a ship or an aircraft.
REGENT has done its homework. With 40% of the world’s population living in coastal areas — and in regions like Japan and Indonesia, where up to 80% of people live in coastal cities — the market for fast, efficient, and eco-friendly transportation is enormous. If some passengers switch from airplanes to Seagliders, the overall carbon footprint of regional transport could be significantly reduced.
Once the 12-seat Seaglider (Viceroy) is certified and enters service, there will likely be demand for larger models. Reports suggest that a 100-seat version is already in the conceptual phase. If development progresses quickly, we could see these futuristic vehicles operating between coastal cities within a few years.
While the Soviet Ekranoplane ultimately failed, REGENT’s Seaglider has a much better chance of success. With modern technology, advanced materials, and a clear environmental goal, this is the right time for a second attempt. Transitioning to fossil-free, high-speed maritime travel is an exciting prospect.
Final Thought
The REGENT Seaglider represents a bold reimagining of the Soviet-era Ekranoplane, proving that past concepts can be revived with modern technology and a fresh perspective. Unlike its predecessor, the REGENT Seaglider benefits from advances in aerodynamics, lightweight materials, and electric propulsion, making it a viable solution for fast, eco-friendly coastal transportation. With strong industry backing and clear market demand, this revolutionary vehicle has the potential to transform regional travel. If successful, it could mark the beginning of a new era — one where we fly just above the waves, seamlessly blending speed, efficiency, and sustainability. The future of coastal transport is on the horizon, and it’s gliding in fast.
I hope that one day soon, I will get the chance to fly three yards above the sea at 180 miles per hour. How cool would that be?