French company Kahe Nautic unveiled the K600, a modular semi-submersible maritime drone priced at 5,900 euros, at the Euronaval 2026 exhibition in Paris.
The drone measures 0.8 metres on each side and weighs 15 kilograms empty. It is designed to carry mission equipment weighing up to 100 kilograms, or over six times its empty weight. Two electric thrusters delivering 1,200 watts of combined power push the vessel to a top speed of six to eight knots for an hour, while a 1,200-watt-hour battery allows up to 10 hours of continuous operation at lower speeds.
The K600 travels with its body submerged and an antenna mast above the surface to maintain radio and satellite links while reducing radar and visual signatures. It can also dive fully to a depth of 10 metres for infrastructure inspections. Kahe Nautic plans to produce 300 pre-series units by September 2027 before moving to full production and larger models.
