but for scuba-diver Jessica Pita, it's a potentially life-saving ditty. That's because she's blind - and her diving partner hums the Jaws theme tune to signal that a shark is nearby. The 21-year ...

Due to factors such as murky water and limited peripheral vision, it can be difficult for scuba ... acoustic signals which are transmitted and received by the speaker and mic on each diver's ...

The dammed river formed the 142-acre lake, and icy cold water from springs preserved ... and a hood are necessary for snorkeling or scuba diving. Even with the required layers, the temperatures ...