Courtesy of WOWSA, Huntington Beach, California.

During Diana Nyad’s ultra-marathon swim attempt, she had a team of experts at her side including Luke Tipple who was one of her protective shark divers.

As a conservationist, marine biologist and television host with impeccable credentials and a comprehensive scope of experience, Tipple explains his role during Diana’s swim here.

He was always on the look-out: quiet, professional and focused. Exactly what Diana needed.

Copyright © 2011 by World Open Water Swimming Association