QinetiQ’s Ocean Basin in Haslar, Gosport, was descended upon by 13 schools and two sea cadet groups.
Teams were invited to design model powerboats, which were then subjected to a grilling from the judges.
Part of the competition includes the creation of a poster describing their design process and explaining why they chose certain elements.
The judges examined the teams’ concepts before deciding on a winner.
The overall winner on the day was Carisbrooke College from the Isle of Wight.
QinetiQ senior programme manager Andy Dinsdale said: ‘This event is a great way to get youngsters xcited and inspired about Science, Technology, Engineering and Mathematics.
‘They use and gain a variety of skills when researching and building their model powerboat, in subjects such as naval architecture, physics and electronics.’