Cold War tech reborn? Meet the Bohai Sea Monster: China's mysterious flying ship could change naval warfare
Synopsis China's jet-powered ekranoplan, nicknamed the Bohai Sea Monster, has finally been seen in full, sparking new interest in this Cold War-era technology. This wing-in-ground effect vehicle is designed to fly just above the sea, combining the speed of aircraft with the stealth and flexibility of hovercraft. Spotted on the Bohai Sea, the mysterious grey craft features four jet engines, a flying boat hull, and military camouflage, indicating a possible amphibious role. With China investing heavily in aviation-tech like the AG600, this new ekranoplan might reshape future transport, logistics, or military operations across contested waters like the South China Sea. China's jet-powered ekranoplan spotted for the first time: Could this 'Bohai Sea Monster' redefine sea-air transport in military operations?- China's jet-powered ekranoplan — a new type of ultra-low-flying aircraft also known as the 'Bohai Sea Monster' — has been spotted for the first time in full. The craft, which flies just above water using ground effect, has drawn comparisons to Cold War-era Soviet 'sea monsters' like the Caspian Sea Monster and Lun-class ekranoplans. Unlike traditional aircraft, ekranoplans (wing-in-ground effect vehicles) use the cushion of air near the surface to fly more efficiently and below radar, offering speed advantages over ships while evading many sea-based threats.
ADVERTISEMENT This new Chinese ekranoplan, spotted docked at a Bohai Sea pier, appears to be a major step forward in China's ongoing push for innovative maritime and amphibious technology. Although its name, model number, and developer remain unconfirmed, the aircraft's size, features, and military-style grey paint strongly suggest a high-level defense project. An ekranoplan is not a boat, not a plane, and not a hovercraft — but it borrows features from all three. These aircraft use 'ground effect,' a cushion of air trapped between the wings and water surface, to glide just meters above sea level. This makes them faster than ships, more fuel-efficient than low-flying aircraft, and able to stay under radar horizons.
This hybrid combines the speed of an aircraft, the stealth of a hovercraft, and the payload capacity of a ship. It features: Four jet engines mounted high on the wings
A flying boat-style hull for amphibious landings
Naval gray camouflage, indicating a potential military role
This isn't just a stunt—China has been ramping up aviation-related amphibious programs, such as the AG600, showing growing interest in air-sea hybrid tech for use in contested waters like the South China Sea. The Soviet Union built massive ekranoplans in the 1960s-1980s, such as the 544-ton Caspian Sea Monster and missile-equipped Lun-class types. However, after the USSR collapsed, the technology was largely abandoned. Despite numerous attempts to revive ekranoplan programs, few large-scale designs have been built in the last 30 years — until now.
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The newly photographed Chinese ekranoplan is the largest and most advanced design seen globally since the Soviet era. Key features include: Four jet engines mounted above its wings — with flattened exhaust nozzles, likely for directing thrust downward during takeoff and landing.
A T-tail structure with dual vertical stabilizers, commonly seen in past ekranoplan designs but rare in conventional aircraft.
Short wingspan and oversized rear section, both trademarks of ekranoplan engineering focused on lift and stability in ground effect flight.
Grey camouflage paint, typically used for military transport or amphibious roles.
Wingtip sponsons (floats) and a stepped flying-boat hull, allowing both sea landings and ground effect operations.
Large side cargo door, suggesting potential use in logistics, troop transport, or search-and-rescue (SAR) operations. The aircraft's full-scale appearance and build quality make it one of the most ambitious ekranoplan projects seen in decades.
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While Chinese authorities have not confirmed its role, several signs point toward a military application, possibly focused on: Rapid amphibious transport across the Taiwan Strait or South China Sea islands.
Supplying island garrisons in contested areas like the Spratlys.
Recovering downed pilots or equipment quickly in near-shore regions.
Potentially supporting anti-submarine warfare or maritime patrols, given its low-flying stealth profile and mobility. That said, China is also developing the AVIC AG600 flying boat, a massive amphibious plane for SAR and firefighting, which this ekranoplan may complement in dual civilian-military operations.
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One major question remains: is the Bohai Sea Monster jet-powered or propeller-driven? Earlier images suggested the nacelles could house turboprops, but the latest photos show large jet-style exhausts and possible upper intakes — a sign it may be a jet-powered or hybrid-electric platform. HI Sutton of Naval News, who first reported the discovery, notes that the propulsion details are still unclear due to low image resolution. There could be dual-inlet designs, spindles, or even electric-assist fans for quieter, stealthier missions. Either way, this is no conventional aircraft, and propulsion innovation is likely part of its test mission.
ADVERTISEMENT The U.S. isn't building ekranoplans—but it doesn't need to. Its response lies in a multi-layered defense strategy, cutting-edge technology, and forward-deployed forces. Here's how the U.S. can counter China's Bohai Sea Monster: The U.S. military uses a joint Navy-Air Force strategy known as JAM-GC (Joint Access and Maneuver in the Global Commons), formerly AirSea Battle. It's designed to overwhelm threats in denied environments like the South China Sea by combining assets across land, air, sea, space, and cyber. Rather than relying on large aircraft carriers alone, the U.S. Navy is spreading its power across smaller, networked vessels. This 'distributed lethality' approach complicates any attack plan—and is perfect for tracking and responding to fast, low-flying platforms like ekranoplans. The Navy's Cooperative Engagement Capability (CEC) and Naval Integrated Fire Control systems fuse data from multiple sources—like satellites, drones, F-35s, and destroyers—to detect threats like the Bohai Sea Monster early and respond fast with long-range missiles. Long-range weapons like the SM-6, Tomahawk, and the new Typhon launcher can be deployed on ships or land. They can intercept or neutralize WIG vehicles before they reach operational range. To confuse or disable the Bohai Sea Monster's navigation and targeting systems, the U.S. could deploy electronic warfare (EW) jamming, cyber attacks, or decoy drones—an updated take on Cold War-style disruption tactics. Autonomous drones, both on the sea and below it, can be used to patrol, detect, or intercept these low-altitude machines. The U.S. is already deploying these in the Indo-Pacific, learning from Ukraine's innovative use of drone boats against larger vessels. The U.S. Navy still holds a major edge in stealth submarine operations. Combined with undersea listening posts and sensors, they provide constant intelligence and tracking—especially in chokepoints where ekranoplans may operate. High-speed threats require high-speed responses. The Navy is testing hypersonic interceptors and ship-based lasers that could knock out fast, low-flying targets before they strike. There is speculation that this aircraft could be: A full-scale operational prototype, perhaps ready for flight testing.
A technology demonstrator, testing composites, radar reduction, and lift efficiency.
A subscale model to inform even larger ekranoplan systems in the future. Interestingly, the design resembles the U.S. Liberty Lifter concept — a DARPA-funded WIG aircraft meant for heavy cargo lift across Pacific distances. Like the Liberty Lifter, China's ekranoplan aims to fill critical logistics gaps in wartime and peacetime, especially where airfields or deepwater ports are unavailable. As tensions rise in the South China Sea and the Taiwan Strait, the People's Liberation Army Navy (PLAN) is preparing for unconventional mobility and logistics needs. The ekranoplan's advantages — fast, stealthy, amphibious — make it suitable for: Beating maritime blockades
Evading radar for rapid coastal insertions
Delivering personnel or cargo directly onto beaches
Supporting island-hopping strategies Moreover, operating close to its home turf gives China flexibility that the U.S. would lack in distant waters. China's investment in ekranoplan technology is no gimmick. The Bohai Sea Monster could offer stealthy, high-speed mobility in regions like the South China Sea—giving Beijing a new edge in gray-zone and conventional operations. But the U.S. isn't standing still. With its networked combat systems, forward presence, and multi-domain firepower, it has more than enough to counter such threats—whether above, on, or under the sea. The new Cold War tech may be rising again—but this time, the battle will be fought with smarter weapons, faster sensors, and unmanned defenders. With just one grainy full photo available so far, experts believe more details will emerge in coming months as satellite imagery, social media posts, or leaked footage surfaces. Given China's trend of unveiling prototypes only after months of secret development, we could be witnessing the start of a new era in sea-air transport. If proven successful, the Bohai Sea Monster might inspire similar projects in other countries — or become a key component in China's future amphibious strategy.
Q1: What is China's jet-powered ekranoplan used for? It's likely built for fast amphibious transport and island resupply missions.
Q2: Why is the Bohai Sea Monster important now? It marks China's biggest ekranoplan since the Cold War, signaling a new military-tech shift.
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