The Athena 0 project was our first rocket generation. Powered by a water jet accelerated under a pressure of 20 bar from the tank into the environment, Athena 0 mainly served as a test vehicle. At low costs, we researched and tested avionics/telemetry, recovery by parachute, attitude stabilisation and pressure tank construction. We have launched our Athena 0.1 and Athena 0.2 rockets in 2021 and 2022.