The concept of a semi-submersible vessel allows passengers to explore the waters both above and below the water. The development was the result of a collaboration between Platypus Craft and Evoy. The vessel resembles a platypus in appearance. It allows you to go deep and then lower its middle part underwater and explore shallow waters without the need for bulky scuba tanks. Platypus develops a cruising speed of 15 knots above water. It can accelerate to 25 knots if necessary. With the passenger compartment lowered, this speed is reduced to 3-5 knots for safer underwater maneuvering. The boat can carry 11 passengers at a time. The prototype is 5.7 meters long and 2.46 meters wide. It has received a Torqeedo outboard engine and a 10 kW battery. Future versions with 50 hp Mercury engines or 10-kW tweens corresponding to a 20 kWh battery are also foreseen. The innovative design allows underwater explorers to have no special training, as an on-board compressor will supply air to special masks via retractable hoses. In addition, diving equipment will be available on board, allowing those wishing to explore the underwater world in a more traditional way. The Evoy-powered model could be launched as early as 2025. The estimated cost of Platypus is 450,000 euros