Apparently something called “wreck racing”  is a new sport.  The website Formula H2O  – Underwater Scooter Racing explains it as follows:

The Wreck Racing League or WRL is the sanctioning body for scuba divers racing using underwater scooters or diver propulsion vehicles on natural wrecks of ships sunk to create artificial reefs.

A video demonstrating the “sport”:

Atocha Scooter Racers

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