A specialized robot goes where humans cannot: into the depths of the Mediterranean Sea to investigate a 16th-century shipwreck described as a “veritable time capsule”. A team armed with a ROV-C 4000 is recovering 500-year-old artifacts from the merchant ship sunk about 1.5 miles below the surface of the French coast – the deepest known wreck in French waters. However, the deep-diving ROV-C 4000 isn’t the only high-tech gadget to uncover this preserved history.
In March 2025, a Navy survey team discovered an anomaly on the seabed for the first time using high-resolution sonar. The crew then deployed an autonomous underwater drone equipped with a camera to investigate the anomaly. It captured images of a 98-foot-long ship filled with goods from northern Italy, now called Camarat 4. The team traced the discovery up the chain of command, who contacted the Department of Underwater Archaeological Research (DRASSM), an organization responsible for protecting and studying France’s underwater heritage.
The DRASSM team was enthusiastic. At this depth, the wreck was protected from pillage, the sun and strong currents. Researchers said the scene made it appear as if time had stopped. The only problem was getting there, as it is well beyond the limits of human divers and too deep to even become an artificial reef. To study the site, researchers used the ROV-C 4000, a deep-sea robot capable of operating at depths of up to 2.5 miles.
The deep-sea robot explores the deepest wreck in France
At the bottom of the wreck, the ocean is almost dark, the pressure is overwhelming and temperatures are near freezing. These conditions put human lives at risk and help explain why 99% of the ocean floor remains a mystery. The ROV-C 4000 was built for this environment. Its electronic, hydraulic and camera components are housed in pressure-resistant systems designed for prolonged operations in cold water. The robot carries powerful lighting and HD cameras, and unlike battery-powered autonomous drones or human divers, it is tethered to the vessel, facilitating continuous power and live image data communication with the crew.
One of the key elements of the mission is the delicate recovery of the cargo. The ROV-C 4000 features manipulator arms designed for precision underwater work, allowing archaeologists to selectively recover fragile artifacts. During the April 2026 mission, he recovered three ceramic pitchers and a ceramic plate. The wreck still contains cannons, anchors, iron bars, cauldrons and hundreds of other ceramics. Although it does not have the array of treasures found on some shipwrecks, it naturally has significant value to historians.
The teams plan to explore the site for several more years using the ROV-C 4000, expanding the initial investigation into a long-term deep-sea archeology project. They want to create a 3D model of the wreck from 86,000 images captured during the mission. The 3D model would allow experts to closely study the ship’s ceramics, naval architecture, artillery and maritime trade artifacts without further disturbing the site.
