American endurance swimmer Diana Nyad, 61, swims in Cuban waters off the coast of Havana, Cuba, Aug. 7, 2011.
HAVANA (AP) -- Endurance swimmer Diana Nyad has more than passed the 28-hour mark of her attempt to swim a record 103 miles in the Straits of Florida.
It was a rough night for the 62-year-old on Saturday, when her crew says she was stung by jellyfish four times.
This is Nyad's third attempt since last summer at a cage-less crossing.
According to her support team, Nyad has been doing the backstroke. She's swimming that way so that the part of her head that is covered by a cap is in front -- in hopes of reducing contact with jellyfish. And a tweet from a team member says "the backstroke is working!" The team reports that she is steadily stroking onward.
An apparatus that is following her in the water creates a faint electric field that is designed to repel most sharks.
Last summer, an asthma attack and then jellyfish stings forced her to abandon two attempts.