1856610 Sheridan.  Cave diving in the extensive limestone cave networks. Vortex Spring is a cold, freshwater spring which consists of a 200 ft (61 m) basin...

because, it's now a full emergency, and the victims are being sucked into a vortex of danger. Pay attention to the briefings; know the dive plan, and stick...

well. When they overtake you at high speeds, they will often create a "vortex" which sucks you towards them. Therefore, be alert and stay in control of...