In March 2025 a French Navy drone was mapping the seabed south of Saint-Tropez when its sonar picked up something large that nobody had recorded. A camera sent down after it found a merchant ship from the 1500s lying 2,567 meters down, the deepest known wreck in French waters.
The drone was not looking for a shipwreck. It was working through a stretch of seabed off Ramatuelle,…