ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Diver propulsion vehicle (DPV). Woman diving with the aid of a DPV. This torpedo-shaped device allows divers or swimmers to explore a far greater area than would be possible if they were unaided. It can travel at up to 15 kilometres per hour. She is wearing a face mask communicator with which she can communicate with other divers wearing the same apparatus. Photographed in the Maldives, Indian Ocean.
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