British-Australian woman set for Cuba-Florida swim

The video discusses a swimmer's journey starting at Marina Hemingway, covering 103 miles under open water swimming rules, which prohibit wetsuits and shark cages. An electric field system is used to deter sharks. The swimmer faces challenges such as hydration, weather, tides, and marine life. The video concludes with acknowledgments and reflections on the journey.

What is the role of the electric field mentioned in the text?

What challenges does the swimmer face during the swim?