Students are used to competing against other universities but today will see a different kind of race - with students furiously pedalling in submarines along the sea bed.
It's all part of an international submarine race in Gosport in what is Europe's biggest covered water freshwater space.
Students from universities around the world will battle to win this unique engineering and sporting event - where pilots in SCUBA gear pedal in a huge tank the size of a football pitch.
Competing teams have come from Canada, Germany, Netherlands, New Zealand, USA as well as Bath, Plymouth and Warwick.
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