Anyone remember the submarine races at LSU Lakes?

Back in early 70’s when I was a kid we would pass the lakes late at night returning from LSU games and see a bunch of cars parked along the lakes.
We asked my big brother what the people were doing in the cars and he explained there were night time submarine races people were watching.
Of course we would look frantically for submarines but would never see any although my big brother would keep yelling “there’s one!”
Ah the innocence of childhood.