As in the previous years, the Hungarian Contest of Applied Engineering Sciences, known to many as “Hungarians on the Mars”, will be organized also this year. We also applied with our team “VAC Robot”, hoping to reach similarly good results as last year. This year’s challenge is extraordinary since the self-made vehicles will have to be controlled and navigated in an 8×8 m pool filled with water, not on dry land. Naturally the objective is to autonomously solve the task this year too. The mission is described here.